Craziest: Grell Sutcliffe - plain crazy
Sexiest: Hidan - just too sexy for me
Cutest: Drocell Keinz - he has cute purple eyes
Coolest: Sebastian Michaelis - I'm amazed by his speed
Stupidest: Ash Ketchum - nothing, no reason. But I think he is. Stupider than Meowth >_>
Most Gary Stu-ish: Uzumaki Naruto - the reason why I started to hate HIS anime and manga
Most Mary Sue-ish: Haruno Sakura - I can't stand her
Mysteriously sexy: Uchiha Madara - after disguising himself as Tobi, you'll see it's the sxy Madara =))
Being a big fan of the new-ish-not-that-well-known manga Skip Beat!, two of my favorite characters are from this manga, and they are:
#1. Mogami Kyouko
Why: C'mon, Kyouko ROCKS!! I mean, she's got all that awesome inherent acting talent AND she can control little evil spirits!! She's sort of evil herself, even though she's the protagonist...but she's SO CUTE!! whee
#2. (no last name specified) Reino
Why: I don't know...probably because he's arguably the most mentally messed up character in the manga world. He's just...creepy...you can sort of see why Kyouko thinks he's a demon. He basically just wants Kyouko to hate him so she'll think about him all the time...that's definitely not healthy.
#3. Tsuruga Ren
Why: He's a sad, sad character... Not going to give anything away about him, though, 'cause there'd be a lot of spoilers...
"Light thinks it is faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it."
~Reaper Man, Terry Pratchet