Comment and I'll pick one (unless you want more) of your fandoms, post the answers to your journal and so on and so forth.
aeron_lanart gave me Dr. Who (Specifically the show, not whole Who-verse). For me this means New Who.
The first character I fell in love with: Captain Jack. Without Jack, there'd have been no Who-watching whatsoever. I was in love with Jack pretty much just from seeing his picture and helping timbershiver with her Jack/Wilson crossover story and that triggered everything else. Once I saw him in The Empty Child there was no turning back.
The character I never expected to love as much as I do now: (Copied verbatim from aeron_lanart's response.) Donna. She annoyed the hell out of me in Runaway Bride, but by the end of her time in the TARDIS she’d become my favourite New Who companion. Oh and Mickey Smith.
The character everyone else loves that I don't: The Doctor as John Smith in Family of Blood
The character I love that everyone else hates: Cassandra
The character I used to love but don't any longer: Tom Milligan
The character I would shag anytime: Captain Jack
The character I'd slap: Tied between Martha's mother and Donna's mother.
A pairing that I love: Jack/Anyone, but if I had to pin it down, it's still Jack/Ten, even though it's painfully, wonderfully, horribly hopeless.
A pairing that I hate: Mickey/Rose
Favourite character: Captain Jack. (Yes, I'm predictable.)
My five favourite characters: Jack, Nine, Ten, Donna, Rose
My five least favourite characters: Jenny, Donna's mom, Martha's mom, Martha's father, Davros.
My deep, dark fandom secret: I feel like Adam Mitchell got a really raw deal and it still makes me a little sick in my mouth when the Doctor makes his self-righteous "I only take the best" speech, when I know damn well the next episode is Father's Day and Rose (who I do love) acts like a stupid spoiled brat.