Good old Mario. Easily one of the best video game franchises of all time. I tend to think you have to be a rather joyless bastard to not enjoy Mario games, especially if you're a child of the 80's or 90's. This was a hard list to do, Mario has had so many games and so many were just awesome. But here are my ten favorites.
Wario. That lead to an interesting boss fight as Wario duplicates all of Mario's power ups in this game. It wasn't a very difficult one but it was interesting.
So that's my favorite Mario games. I doubt the top two are any surprise to anybody. Now if you'll excuse me, I think I have a Princess to go save.