Super Mario World - I've got 96 levels more times than I can count
Super Mario 64 - 100% every star
Super Mario Galaxy - 100% every star

I haven't played Sunshine or SMG2.

I regularly play Super Mario World to try and complete all 96 levels in one sitting without losing a single life. I still haven't managed it yet. Special Road keeps being a bastard. I actually got to 91 levels on a recent effort before being thwarted in Valley of Bowser.

I was not pleased.