It helps when you haven't played many games!
It's extremely weird in a way - I only really started gaming in 2008 with stuff like Super Mario Galaxy and Super Smash Bros. Brawl, yet nowadays I have the most fond memories for games from the NES and SNES eras (and my favorite games outside of that era are the two Super Mario Galaxies...and then Resident Evil 4 close behind), and Mega Man 2 has officially joined my "circle of timelessness" along with 16 other games (half of which are from the NES and SNES eras and two of which are from the N64 era) which I will defend to the death and will never understand why people hate them.
It also probably doesn't help that I'm really into futuristic technology now for whatever reason, and Mega Man 2 goes well with that. So will Final Fantasy VII and Metal Gear Solid, likely.
Also a lot of fond memories of mine come from watching YouTube LPs of I Wanna Be the Guy, and Mega Man's influence there is so apparent it isn't even funny.
Yet, correct me if I'm wrong, but wasn't Mega Man 2 only worked on by its developers in their spare time? It certainly feels like a game that that extra love was devoted to.
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Currently Playing - StarCraft
Hopefully Next Up - Final Fantasy VII, Metal Gear Solid, Brood War