Are video games allowed? If so, then I pick Shion Uzuki from Xenosaga.
Literature? I definitely fell in love with Ai Imajo from David Mitchell’s Number9Dream. sighs dreamily Anyone ever read it?
And yes, I once fell in love with Counselor Deanna Troi from Star Trek: TNG. I was 15, okay? 
Adam
Well, she is the next best thing to Bailey Quarters…
Imoen from the Baldur’s Gate game
“I am gone”, “I care not”, “Yup”, “I’ve done had enough of this”, “Where we goin’?”
Total love at first click I tell you…
First of all, jsgoddess, there’s nothing at all weird about falling in love with Reepicheep. I’m not inclined towards males, but if I were, I could very easily see myself head-over-heels for him.
I was reminded by another thread of Trillian, from the Hitchhiker’s Guide books. But not the TV version; she was just a ditz. And I also feel obliged to add both Dora and Minerva, from Heinlein’s Time Enough for Love.
Also, speaking of Minerva, I ought to throw in Pallas Athene, from the ancient Greek mythology. Let me tell you, that Paris schlub had no taste in women.
And of the various Star Trek babes, easily the best is B’Ellana Torres, of Voyager. Which admittedly sets up a bit of cognitive dissonance, since I’m then forced to admit that that show exists.
Fitzwilliam Darcy, and just to change it up a little, The Scarlet Pimpernel, aka Percy Blakeney.
I can’t believe I forgot Percy Blakeney.
See? It’s the whiskers!
I may be the world’s only Pride and Prejudice fan who has a mad crush on not Darcy, not even Wickham, but Mr. Bennett.
Dorothy Boyd - Jerry Maguire.
Lord Goring from An Ideal Husband, and Rupert Everett is yummy in the movie version.
Dr. Jubal Harshaw from Stranger in a Strange Land & To Sail Beyond the Sunset.
Han Solo
Nick Charles from Dasheill Hammet’s Thin Man mysteries
Spike from the Buffyverse
Oh, testify on Mr. Bennett. Yuh-huh.
From Shakespeare, a little Rosalind, Rosaline (from Love’s Labour’s Lost , not that other play), as well as Mercutio, Benedick, and, uh, Richard III.
Literature – d’Artagnan, for sure, although I’m also partial to Aramis; I’ll see vivalostwages’ Dr. Maturin and raise you one Diana Villiers. Enjolras from Les Mis. Crowley from Good Omens.
And, Odysseus. Yes, that Odysseus. He’s foxy! I mean, as sly as a fox.
Monsieur Paul, from Charlotte Bronte’s Villette. And Odo from DS9. I must like old grumps.
Television
Malcolm Reynolds
Wash
Simon Tam
… hell, all the male cast of Firefly
Jack Bauer
Worf
Books
Jamie Fraser
Aragorn
Eomer
Jack Aubrey
Stephen Maturin
Movies
Captain Jack Sparrow
Han Solo
Wolverine
Wesley from The Princess Bride
Rawdon Crawley from the latest Vanity Fair
Gilbert Blythe (Anne of Green Gable series)
Sam Gamgee (Lord of the Rings series, duh)
I’m a “home and hearth” kinda gal
Oh god, yes. What a voice, growl…
Valen Shadowbreath from the videogame Neverwinter Nights: Hordes of the Underdark, too. Mm, yummy.
Rainbow Brite
That is just wrong on so many levels.
Oh, see, Strongbow’s way more my style. Gotta love the strong, silent types.
I’m head over heels for Jamie Fraser, from Diana Gabaldon’s Outlander series. Shirley Ujest, you can have Ranger, I’ll take Morelli (from the Janet Evanovich Stephanie Plum books.) Lessee, who else… Lussurioso, from the film verson of Revengers Tragedy, as played by Eddie Izzard (although to be completely honest, I’d take Eddie in any guise, so perhaps that’s not really a fictional choice.) I want Atticus Finch to be my dad, and the Weasley kids to be my nephews and nieces. Robert B. Parker’s Spenser is a doll, but for pure sex, no chit-chat, I’ll take Hawk, thanks.
I’m honored
Nothing wrong with that.
Nothing wrong with that.
Nothing wrong with that.
Weird. 
The girl from 9 Chickweed Lane (Emma?). I wish my imagination was still that active.
Nymphadora Tonks from the fifth Harry Potter book. Mmm, Coolidge effect.
If I were a little younger George Michael’s cousin on Arrested Development (Maebe?). According to Cecil there’s nothing wrong with it.
Athena, but I think she’s a little out of my league.
Sada Jacobsen. What do you mean she’s real? No one can have that much class, style, and brains and still seem like a person that I could grab a cup of coffee with. Not to mention being really good at a cool sport (fencing). Nope, I clearly dreamed her up…
Winifred Burkle from Angel
Kaylee from Firefly
Anya from Buffy
I think Joss Whedon has a nack for finding the most attractive actors/actresses in the 'Verse.