Years roleplaying: I tabletopped in college, not very frequently but I'm counting it, so I'mma say about 16 years.
Favourite three characters?: Xander Harris (like that was a question), Francine Peters, and Eliza Doolittle. FHers, contain your shock.
Least favourite character?: Oddly, I've had problems playing Spike (whom I love to write) in RP format. It may have just been the setups and formats at the time, though.
Male or female characters? Both, though I've played more males overall. At FH, I've actually played 2 boys and 3 girls, though.
Oldest character? Xander, if we're talking oldest character I'm still playing.
Newest character? *dances all night*
Most popular character? I would guess Xander because he's been around (at FH) for three years, and I suck at socializing student characters with any degree of speed. Eliza is my first adult at FH who's not Xander*, so we'll seeeeee.
Character you've made and never played? A billion tabletop characters, but for LJ RP, pretty much Illyria and Schmendrick, the Last of the Red Hot Swamis.
*There's Lorne, but a) he was co-played, and b) he was adopted, and his popularity was firmly established by gumboy
Which character of yours would be most likely to...
Jump off a bridge? Spike; it's not like it would permanently damage him, unless it was a river of Holy Water.
Kill somebody in a very unorthodox way? Like eat an attacking jello dragon? That'd be Xander.
Get married? Xander is married, Francine is the Girl Most Likely. Eliza did, depending on which canon you go with.
Be far too hyper for their own good? Mrrf. Xander on too many Twinkies? Francine when freaking out about something.
Rape somebody? Sigh. Spike. Which is probably why I had problems playing him, as all the RPs in question occurred after Seeing Red was broadcast, though one was AU and the other didn't directly mention it.
Be raped? Statistically? Francine, Eliza, or Door. Likelihood of me ever doing that to any of them? Zero. (I would add wes_visions_rpg Willow on there for the five minutes I played her, except she was a season 6 Willow with the bad bad mojo.)
Get lost and refuse to ask for directions? Spike. (He's my go-to character for stuff none of my FH peeps would do, apparently.)
Get lung cancer? Spike, if he were alive. None of my others smoke.
Star in a horror movie? Any of the Buffy characters, who live in one all the time.
Star in a whore movie? theboobiequeen. She's very positive about her sexuality.
Star in a video game? Any of the Buffy characters. *points to Chaos Bleeds
Make the world a better place? Xander.
Have a torrid gay love affair (where the character is not normally gay)? Xander/Francine. Xander did, and it's kind of Francine's life-story. Eventually.
Relate each word to a character of yours:
Seduction: Francine. Oh, Soap Opera Weekend.
Lies: Francine, Francine, Francine. Although mostly she gets lied to.
Ice: Illyria if I ever actually play her
Would you ever...
Play a prostitute? *cough*
Play a musician? Have done: Lorne.
Play a pilot? Sure.
Play a homosexual? Duh. Though you know, I don't think I've ever actually played a character who was unequivocally and unambiguously gay. No wait, my five minutes as Not!Andy Hallet in btvsatsrpsrpg.
Play a pedophile? Maybe as an antagonistic NPC for someone, but not as a PC.
Play a politician? Maybe. The subject doesn't interest me in fiction, but there are characters who might.
Play a PC based on someone you know IRL? *points to theboobiequeen*
Play a PC based on someone you know online? *points to theboobiequeen*
Play a PC based on someone you like? *headtilts* Huh?
Create a character for the sole purpose of smut? Yeah, I'mma steal other people's answer here: I'd get bored.