Well, I like it due to the Alice in Wonderland theme, and the mix of action, comedy and a litle romance, with few boring moments.
Favorite character-wise, it's tied between Vincent Nightray, Rufus Barma and Xerxes Break/Kevin Regnard.
Mainly because Vincent and Rufus are just so badass, and Vincent's psychoness, and Rufus' badass fan-wielding skills are just so eye catching. I also like their hair
I like Break due to his candy love, and his habit of teasing Sharon. Oh, and his personality is also love, and with Emily, he is an awesome guy.