I've only really had one major anime/manga character crush in the last decade or so, and that's been Train Heartnet, specifically the manga version of him. to a lesser extent I've crushed on Kiba from Wolf's Rain, Bolt Crank from Eat-Man, and Hei from Darker Than BLACK.
Gaara (Naruto)
Allen Walker (D. Gray-Man)
Rin Okumura (Ao No Exorcist)
Senior Nekozawa (Ouran High School Host Club)
Ray Kon (Beyblade)
Sebastian Michaelis (Kuroshitsuji)
Yoite (Nabari No Ou)