Games I've Played the Most

Not a list of the best games I've ever played, the most influential or important games I've ever played, or my favorite games.  Just the ones I've sunk the most time in over the years.  (Sticking with RPGs only).  Feel free to leave your own top 5 in the comments.

1. Mentzer/BECM D&D
2. Star Frontiers
3. 3E (3.0/3.5) D&D
4. AD&D (1E/2E)
5. d20 Modern

Yeah, mostly D&D in one form or another.  I've tried plenty of other games over the years, but these are the only ones I've played to any great extent.