Ahh. Cicero, arguably one of the most annoying or most unique and enjoyable characters in the vanilla game.
So how do you deal with him. Do you slaughter the fool, take his cloths and dance on his body or do you let him live so he can do the dancing...Or are you really against him and never start the Dark Brotherhood Quest just so you don't have to put up with him...
Personally I enjoyed the character, I don't bring him around with me but I do enjoy letting him live...
I personally prefer him dead, but I can't think of many good reasons for a cut-throat assassin to want to scratch out a valuable resource like that. His insanity may be clear, but so is his loyalty to the Night Mother/Listener. I don't use him as a follower just because his voice and his antics are annoying, but he's a pro assassin, and for an assassin's guild, that's worth keeping around.
Bah, all of you hate Cicero...meh, whatever. But that does bring another question into mind, what about other members of the DB, any favorites, any you hate.
I love the usual Festus, Nazir and Astrid, well I guess not everyone likes Astrid but I think it was her that truly created the Dark Brotherhood, she made it different from some of the other guilds by just sort of being a bitch...Great design to her.