I've played Megaman 1, 2, 3, 4, and 8. The coolest thing was the weapon Pharaoh man gives you, a genki-dama like ball. And Rush.

And I played all the X series, except the 3-D ones. In my opinion, the X series should have ended on X5.

Other than those ones, I've played Megaman Legends 2, The Missadventures of Tron Bonne (Servbots are awesome, and you know it.), and Megaman Battle network 4.