Birdy

Cowboy Bebop

Dragonball

Flame of Recca

Gundam Wing

Hunter x Hunter

Inuyasha

Mononoke Hime

Oddments

Outlaw Star

Ranma 1/2

Rurouni Kenshin

Trigun

Yuu Yuu Hakusho

But Princess!
Recca's got the unmistakeable expression of a guy who's trying to reason -- unsuccessfully -- with the girl he loves. We've all been there, haven't we?
 
Added: 3/8/08 From: Celga
 
But Princess!