I will have to check my sources about the second season thing. Which means doing a little research, I don't mind. It's what I like to do. I heard a rumor, but I want to confirm it.
Momiji is my fave - I was born in the year of the rabbit! Woo Hoo!
I honestly couldn't choose a single on to be my complete and utmost fave. I love all of the characters for different reasons. Shigure cracks me up, he seems to always have something up his sleeve, Ayame is tiring, Hatori is just cool.
Yuki, well he's a personality all his own, Kyo needs some anger management classes, so does Kagura really (when it comes to Kyo that is). I could go on for days about the rest of them. Maybe in another post. ^_^