I don't think Keiko is stupid, she did a lot of smart things considering her position. Shinji, Hojo, and Kagome, definitely. Anyone who's ever got pissed off because "you scratched my beautiful face". The entire Keroro Platoon, but I love them for it. Yakumo of 3x3 eyes before he became badass in the sequel. Renton was a fool, but he was a fool for love. Nina from Gundam 0083 makes me sick. Kira Yamato for being so easily manipulated and plainly ignorant. Team Rocket.