I have 14 characters, about half of which I actively use. The rest are inactive, not because I hoard characters, but because I haven't met much success with them on the board as far as finding writers interested in RPing with those characters. I always strive for something unique and it can be hit-or-miss as far as how receptive the audience is. I like them, but they may not work for this particular board.
That being said, I have a lot of fun with most--if not all--of them, and especially the ones who obviously have the higher post counts.
My favorite is a bit difficult to decide, as I have two characters that I love equally. And they both really like to wear trenchcoats, so maybe that's the key to a good character in my case.
[member="Geneviève Lasedri"] is a blast to play. She's really mysterious, assertive, and crass, which is not something I had explored much of previously. Her thought process is so fun to get into, because she somehow cares about people as a whole but is the most apathetic shrew on a personal level. I also love how she plays like an NFU but is still a Forcie. Sure, sure, you could say it gives her more possibilities and some very interesting internal conflict on the use of power (especially since she's leader of the Rebellion, after all), but I really just like it as an embellishment to be used sparingly--an illustration of her superiority complex and questionable integrity. There is so much discovery her character has been through, and so much story ahead of her.
But despite all the fun I have with Geneviève, I think [member="Corvetta Salvo"] edges her out by the slightest of margins. She's inventive, funny, and just plain weird at times. She (and I

) just makes crazy stuff up sometimes and flies by the seat of her pants while maintaining a really spunky spirit full of self-confidence, yet she has a major flaw that is hard to deny as justified. I love her perpetually cheerful personality and blissful naivete (It's not that she doesn't know. She just pretends not to. She had a crush on a Sith once.) because it brings out my own cheerful side, even when I'm down.