@Ninpanda
I've yet to play Mega Man 3...I guess I should. 
And now, for something completely different:
#45 Legend of Zelda: Link's Awakening DX (GBC)
"Journey to the Giant Egg"
I bought a GameBoy Color for this game. I think it's the fourth Zelda game I played. Ocarina of Time was marvelous but I still loved 2D Zelda so this game was a definite buy!
It's one of the most challenging Zelda games I've played, mostly because I got lost the whole time...
"How do you get lost when you have a map!?" Pah, there's nothing I can't do!
Link's Awakening offered the great gameplay that I've come to expect from Zelda games with some clever dungeons and puzzles that made me scream sometimes. And yes, that's a positive thing. I like when games are challenging in a non-cheap way and that's what this game is. It's been a while since I last played it so maybe I'd finish things quicker if I replayed it...
#44 Diablo II (PC)
"Go to Hell!"
The first Diablo was fun but felt stale after a while. The sequel on the other hand was 4 times bigger with more characters, more items, more...everything!
I have played Diablo II so many times and if I were to fire it up right now I would have a great time. It's just that good. The gameplay is as solid as it gets and with all the new classes, skills and weaponry there are tons of different ways to find variation in the game. It only does everything!
While it's not the ultimate build (far from it!) I had much fun with my sword-sorceress. 
She kicked some serious butt with her offensive spells and customised Crystal sword.
