Your MOST favourite....

Nuclear test footage, specifically the Crossroads Baker underwater shot.

Favorite Sideshow Bob episode

“Brother From Another Series.” It was as much fun as watching an episode of “Frasier,” and for good reason.
Your favorite “The Big Bang Theory” episode?

The Loobenfeld Decay - Sheldon makes up a convoluted lie to get out of watching Penny perform and enlists a coworker (played by DJ Qualls) to play his drug-addicted cousin, Toby Loobenfeld. Toby laments that his “bourgeois” parents made him choose physics over acting. Toby takes the role way too seriously and adds more lurid details to his story, much to Sheldon’s chagrin, who can’t stand it when people change things. After his performance, Sheldon snidely tells him “Your parents were right.” Penny however, totally bought the story, proving Sheldon wrong.

Favorite Rajesh Koothrappali moment

That’s my favorite episode too!

He, Leonard and Howard have just seen an ad on the bulletin board in the physics building for test subjects for a new anti-anxiety drug, and Raj wonders aloud why it’s there-- that is, in the physics building. Leonard makes some remark about how it might as well be in the comic book store as well.

Shortly thereafter, they all meet Sheldon’s sister, to whom they are all attracted. She asks Raj a question, and he can’t answer he, so he turns and walks away. He goes around the corner, then he comes back to the bulletin board, and gets the anti-anxiety drug notice off the board, and leaves again.
Favorite Amy Farrah Fowler moment.

When she acted like she got game and advised Leonard “Try not to ogle my caboose as I walk away.”

Favorite Howard Walowitz moment

When he does the card trick that Sheldon can’t figure out.
Favorite Penny Hofstader moment (but feel free to pick something from before she was a Hofstader).

When she put on glasses and said “molecule” to Leonard seductively

Favorite Bernadette moment

Her first appearance, actually: her blind date with Howard. There are lots of runners up, though, like when she tells Howard “I just had a seemingly endless dinner with your mother.”
Favorite Mary Cooper moment.

Telling Sheldon “Go to your room” while he protests that he’s a world-renowned scientist. That was the most humble Sheldon moment in the entire series.

Favorite Mrs. Wallowitz moment

The episode where she kidnaps Raj.
Favorite Stuart moment.

Gradations of Wrong His argument with Sheldon in the hallway.

It’s a little wrong to say a tomato is a vegetable. It’s very wrong to say it’s a suspension bridge.

Favorite running, reoccurring Big Bang joke.

Howard’s imitation of Stephen Hawking

Favorite meltdown by any TBBT character

When Amy pretends to be interested in Sheldon’s Xbox dilemma, then yells at him to pass the butter.

If that doesn’t count as a meltdown, then the one in the comic book store Sheldon has where he does an imitation of his parents fighting, and ends up saying “What’s making Sheldon cry is THAT I LET YOU NAME HIM SHELDON!”
Favorite lecture topic of Sheldon’s.

His lecture in The Thespian Catalyst - I agreed to speak to you this evening, because I was told that you’re the best and the brightest of this university’s doctoral candidates. Hmm. Of course, that’s like saying you are the most important electron in a hydrogen atom. ‘Cause, you see, there’s only one electron in a hydrogen atom. Best and brightest, my sweet patootie.

Favorite TBBT group costume

Why, the classic Justice League of America, of course!
Did we have a favorite Leonard moment, or did we forget him? If so, favorite Leonard moment.

When Leonard joins Penny and her friends to watch a football game on TV. Of course, Leonard knows nothing about football, except what Sheldon has told him in a quick tutorial, and makes a fool of himself trying to comment on the gameplay.
Favorite Mrs. Wolowitz moment?

Downhome Sophisticate by Corey Harris

Favorite guitarist who didn’t get the attention he/she deserved.

Jeff Lynne still gets dissed by some.

Favorite ELO album?

Their first one, before they got all polished and muzak-sounding.

Favorite vocalist who doesn’t the recognition they deserve

Bobby Darin - a bit obscure these days, alas.

Favorite actor (not actress) who shoulda oughta won an Oscar, but wuz robbed?