LP? The Irish Rovers "All Hung Up". Hey, I was 8!
CD? Kate Bush’s “The Kick Inside”. Amusingly, the actual CD had the name of the album wrong, as just “Kick Inside”.
I can’t remember the first DVD that I ever got even though I know that I still have it, but I do remember the first CD that I ever got. I believe that it was the CD that came with my copy of the autobiography that one of my most favorite female singers wrote named Nickel Dreams. I have been a fan of Tanya Tucker ever since 1991. 
God bless you and her always!!!
Holly
45: Heart, Crazy on You
LP: Blondie, Autoamerican
Cassette: Hall & Oats, H2O
CD: Pink Floyd, Momentary Lapse of Reason
DVD: Blade Runner Director’s Cut
mp3: Pink Floyd, a bunch of live bootlegs in the original Napster days. Ah, the joys of running an all night downloading session on dial up modem only to have a roommate pick up the other line and disconnect me. No smart restart of partial files back then younguns!
78: inherited a box of old showtunes from a dead relative, which I planned to sell on eBay but never got around to it.
45: can’t recall – probably “Pac-Man Fever” by Buckner & Garcia.
LP: Blondie “The Best of Blondie”
Reel-to-reel: n/a
8-Track: n/a
Cassette: “The Road to Freedom” by L. Ron Hubbard & Friends, stolen from the Scientology Center after taking their stupid personality test.
CD: “Holst: The Planets”
SACD: n/a
mp3 (Napster): Burzum “Det Som Engang Var”
mp3 (legal): Heart “City’s Burning”
VHS: “Teenage Mutant Ninja Turtles” (1990 movie)
Laserdisc: n/a
DVD: “To Live and Die in L.A.”
HD DVD: n/a
Blu-Ray: n/a
78: N/A
45: Hungry Heart - Bruce Springsteen
LP: Discovery - ELO
Reel-to-reel:N/A
8-Track: N/A
Cassette: The Wall - Pink Floyd
CD: Making Movies - Dire Straits and Born to Run Bruce Springsteen
SACD: N/A
Laserdisc: N/A
DVD: Goodfellas (so old it was single layered, double sided disc)
HD DVD: N/A
Blu-Ray: Goodfellas (had to replace the DVD)
78: N/A
45: Convoy by CW McCall (1974)
LP: KTEL’s Fantastic compilation album (Christmas, 1973)
Reel-to-reel: NA
8-Track: NA
Cassette: The Motels - All Four One
CD: Sgt. Peppers / Beach Boys Endless Summer / Eagles GH (same day)
VHS: Rain Man (I’m guessing – part of RCA club)
Laserdisc: E.T. or possibly Terminator 2
DVD: Don’t recall
HD DVD: N/A
Blu-Ray: Monster’s Inc. was given away in our office
3D Blu-Ray: Hubble Telescope documentary
I never used Napster.
I have used iTunes; perhaps there should be separate entries for music (Trace Adkins’s “Til the Last Shot’s Fired”, right after I heard him sing it at a National Memorial Day concert) and movies (none).
Was any music ever released commercially on MiniDiscs in the USA? I owned a portable MD recorder at one point; my car didn’t have a CD player, but the stereo system did have an auxiliary input jack, and I had worn the cassette player out (the second car I had done that to, mind you), so I recorded my music onto MDs and played them with an external player.
45–Heartbreak Hotel—Elvis
Good ideas. Here’s my revised list (with corrections).
78: n/a
45: n/a
LP: Grieg Piano Concerto, Arthur Rubinstein
Reel-to-reel: Switched-On Bach
8-Track: n/a
Cassette: The Best of the Stan Freberg Shows (bought around 1987)
CD: Amahl and the Night Visitors (original cast)
SACD: n/a
VHS: A Man For All Seasons (Scofield) (before that I got “A Charlie Brown Christmas” free with x gallons of gas)
Laserdisc: Fantasia (I never bought a player. I only bought the disc as insurance against Disney never releasing it again.)
DVD: Beany and Cecil: The Special Edition
HD DVD: n/a
Blu-Ray: Becket and Fantasia (tie. I bought Fantasia just before it went back into the vault and included Becket on the same order)
paid d/l mp3 track/album: March Past of the Kitchen Utensils, from "Incidental music for ‘The Wasps’ by Aristophanes", by Vaughan Williams, from Amazon.
paid d/l video: n/a
I don’t know if we really want to get into separate legal sites, as well as BitTorrent and pre-legal Napster.
78: n/a
45: Smokey Robinson & The Miracles - The Tracks of My Tears
LP: Elvis Presley - Elvis’ Golden Records
Reel-to-reel: n/a
8-Track: n/a
Cassette: Queen - Live Killers
CD: Husker Du - Flip Your Wig
VHS: The Breakfast Club
SACD: n/a
Laserdisc: n/a
DVD: The Last Dragon & Kentucky Fried Movie (bought them at the same time; neither held up and I sold them both almost immediately)
HD DVD: n/a
Blu-Ray: Chungking Express
I love that song! 
God bless you and Trace always!!!
Holly (a day one fan of him)
It’s fun reading these posts and thinking: “Wow, that poster’s got to be my age!”
78: n/a
45: Might have been Convoy. Might have been My Little Town.
LP: Touche’ Turtle. My mom must have bought it for me, I don’t think I’d heard of him before I had the record.
Reel-to-reel: n/a
8-Track: Eagles Greatest hits or maybe Beach Boys (I mostly don’t even like the Eagles or the Beach Boys)
Cassette: Taped albums, never bought a pre-recorded cassette that I recall.
CD: Surfing with the Alien, Joe Satriani. (Bought before I had a CD player, and had a friend tape it for me.)
SACD: n/a
Laserdisc: n/a
DVD: nothing memorable
HD DVD: n/a
Blu-Ray: nothing memorable
78: don’t think I’ve ever had the pleasure
45: don’t remember
LP: I’m almost certain it was some movie theme collection done by some no-name orchestra.
Reel-to-reel: nope
8-Track: probably the Empire Strikes Back soundtrack
Cassette: probably Goofy Gold
CD: bought Pink Floyd’s Animals and Beethoven’s Ninth (Vienna Phil., von Karajan conducting) at the same time
SACD: nope
Laserdisc: Star Wars “faces” set, which I bought with a used LD player
DVD: bought several the first day: The Simpsons season 1, Star Trek: The Motion Picture director’s cut, American Beauty, and The Conversation are the ones I still have.
HD DVD: nope
Blu-Ray: nope
Mostly I don’t remember, but the first VHS tapes I had were collections of *Schoolhouse Rock: History *and and Grammar Rock. Now I have them on DVD.
1st CD was Abba greatest hits bought from Columbia.
78: I vaguely recall having some Disney 78s when I was like 5
45: don’t remember, possibly “De Do Do Do De Da Da Da” by The Police
LP: Back in Black by AC/DC
Reel-to-reel: n/a
8-Track: Parallel Lines by Blondie
Cassette: don’t remember
CD: Not of This Earth by Joe Satriani
SACD: n/a
Laserdisc: n/a
DVD: don’t remember
HD DVD: n/a
Blu-Ray: n/a
78: N/A
45: Too long ago to remember
LP:Too long ago to remember
Reel-to-reel: N/A
8-Track: N/A
Cassette: Too long ago to remember
CD: Partridge Family and Monkees greatest hits (bought them at the same time)
SACD: don’t even know what this is…
Laserdisc: N/A
DVD: Don’t remember
HD DVD: N/A
Blu-Ray: N/A
**45: I Want To Hold Your Hand / I Saw Her Standing There - The Beatles
LP: Meet The Beatles
8-Track: Livin’ the Blues - Canned Heat, and Big Brother and The Holding Company (same time)
Reel-to-Reel: (all quadrophonic editions) On the Threshold of a Dream - Moody Blues; War Child - Jethro Tull, and Stormbringer - Deep Purple (all at the same time)
Cassette: Close To the Edge - Yes
VHS: A Clockwork Orange
CD: Led Zeppelin 1
DVD-A / DTS: In Absentia - Porcupine Tree
SACD: Avalon - Roxy Music**
78: N/A
45: Mellow Yellow, Donovan
LP: Rubber Soul, Beatles
Reel-to-reel: N/A
8-Track: Band On the Run, Paul McCartney & Wings (This was my first and last 8 track. Wretched format.)
Cassette: Not sure. Could have been something called, “Dancing’s Greatest Hits” (included One Night in Bangkok and Puttin’ On the Ritz) or a Miami Vice soundtrack.
CD: Midnight On the Water, David Bromberg
SACD: N/A
Laserdisc: N/A
DVD: The Patriot ( The one with Mel Gibson)
HD DVD: N/A
Blu-Ray: N/A
Downloaded song: Still the One, Orleans
Downloaded Album: Maria Muldaur, Maria Muldaur
Downloaded Movie: Tropic Thunder