I have full sets of the following; some series haven’t been fully released to DVD, so I just have what’s been released.
Family Dog (complete on laserdisc)
Robotech (complete Legacy collection boxsets)
Exo-Squad (season 1)
Wonder Woman (complete)
Voltron (all of the lion series, and the two released land/sea/air team sets)
South of Nowhere (seasons 1 and 2)
Police Squad! (wow, a whopping 6 episodes)
Nip/Tuck
Terminator: The Sarah Connor Chronicles
Unscripted
The remastered Peanuts TV specials being released by Warner Bros.
This Is America, Charlie Brown (complete, single set)
Clerks Uncensored (like Police Squad!, this is just 6 episodes)
Weird Al Show (complete, single set)
Spawn (the first two volumes on laserdisc, the third on DVD)
I’m still trying to find an affordable season 3 set of Mutant X to finish that series off. Eventually, I’ll probably pick up seasons 2-on for Dark Angel and The L Word to have complete sets, but I wasn’t too taken with the first seasons of either, so they’re low in priority.
Star Trek: Original, TNG, & DS9
Stargate SG1
Stargate Atlantis
Babylon 5
Pretender
Alien Nation
Briscoe County, Jr
Firefly
Nero Wolfe (A&E)
Lord Peter Wimsey
Dorothy Sayers Mysteries
Rumpole
Wild Wild West
The West Wing
Las Vegas
Get Smart
Man from UNCLE
Rockford Files
Boston Legal (as soon as the season 5 I just ordered arrives)
Eureka
Commander in Chief
The Muppet Show
Dinosaurs
and probably a few others, but I don’t feel like walking over and checking
Did they ever get past the first half of the second season of Gargoyles? If not then I have all that’s been released (The first season and part of the second.)
Which is substantial considering my entire DVD collection consists of those two disks, and the 3 LOTR movies.
Arrested Development
Black Adder
Big Bang Theory (okay, so only one season has been released…)
Curb your Enthusiasm
Deadwood
Dead like Me (own the movie, don’t like it)
Entourage
Freaks and Geeks
Friends
Kenny Vs. Spenny
News Radio
The Office (UK - special inc.)
The Office (so far)
Psych (so far)
Robin Hood (the BBC series)
Seinfeld
3rd Rock from the sun
The Tudors
Undeclared
The Wire
I haven’t checked lately, but I think I own everything Animaniacs related that has been released.
The X-Files (plus both movies)
Buffy The Vampire Slayer
Dawson’s Creek (plus the extended finale DVD)
Millennium
Roswell
Joan of Arcadia
One Tree Hill (so far)
Dark Angel
Boomtown
Wonderfalls
American Gothic
Harsh Relm
The Lone Gunmen
Invasion
Miracles
Eerie, Indiana
Working on:
Bones
House
Supernatural
Titus
Everwood
West Wing and The Tick. Both I saw more or less in their entirety on TV (meaning, I may have missed the occasional episode, but that’s all). One I haven’t been able to get through again, and one I watch over and over. I’ll leave it to you to speculate which is which.
Not counting series which have only a first season release:
The West Wing
MASH
Babylon 5
Remington Steele
The Rockford Files
Quantum Leap
Daniel Boone
Joan of Arcadia
Sports Night
The Streets of San Francisco
Law & Order
Hardcastle & McCormick
Soap
Barney Miller
Inspector Lynley Mysteries
McCallum
Alien Nation
The Dead Zone
The Big Valley
House
Hill Street Blues
Dorothy Sayers Mysteries
The X-Files (incl the 1st movie, haven’t gotten around the 2nd movie, but will)
Firefly (incl Serenity)
Monty Python’s Flying Circus (incl the major movies)
The Ben Stiller Show (although, to be fair, there’s only the one)
Not really a TV show, but I’m working on getting all the Looney Tunes Golden Collection
Just Firefly (including Serenity). I also have one season of Buffy. Most of the series I would like to own tend to end up being syndicated so I tend to just tivo them rather than buy the DVDs.