You can list them all if you feel like it. :) For me it's mainly just Pokemon and Mario, with some Harvest Moon and .hack//G.U. for PS2 thrown in there.
Gosh, they are all so good! My favorites have to be May, Pichu, Jirachi, and Mudkip! But they are all so great that it is difficult to choose! You're a very good artist. :D