Just like the title says. Who's your favorite video game character, overall, or per game or game genere if you wish.
This one is my overall favorite nowadays, Shiori Fujisaki from the Tokimeki Memorial games
Others I like from various games (all Fighting Games incidentally):
Seung Mina from Soul Caliber/Soul Caliber 2
Hitomi from Dead or Alive 3
Lei Fang from the Dead or Alive series
Ein from Dead or Alive 3 (particularly his "Matrix" look)
Aoi Himezaki from Project Justice
Sion from Melty Blood
Shiki Nanaya from Melty Blood
Akari Kamagishi from Queen of Hearts '98
Multi from Queen of Hearts '98