BN and SF are definitely not Megaman at his best. and they a pretty far cry form his root, but I still found them fun. as for Legends...In my book it's not just Megaman at his best but one of my all time favorite games ever! It's one down side is the story line is really hard to figure out, but if you can than it's one of the best stories ever. As for ZX Only played through it twice, it's the only sidescrolling Megaman I've ever beat. The story is pretty good and I love the game play, so I guess I recommend that one too.
WOW. did not mean to go on that long...sorry. (I suck at spelling so forgive any mistake you find.)