Not bad...

[A Black Falcon]

As I implied there, I found the NES and Game Boy Mega Man games managable, but starting with the SNES, the series began to get more difficult... but yes, there were some games that definitely stood out within that, such as Mega Man & Bass (very hard game!), the Wily Fortress sections of Mega Man 7 and Mega Man 8, the final levels (Sigma levels?) of Mega Man X5, the whole games of Mega Man X6 and the Mega Man Zero series... just give me some more of Mega Man 5, NES: something fun, with cool bosses, but easy with abundant extra lives that you can beat without much trouble while still having fun. :) Or any of the NES games after the first one, really (the first one is a lot harder since you can't save. That is, unless you're playing MMAC, where you can, so MM1 isn't really any harder than 2-6 anymore)... while there are some tricky spots, it's nothing a few tries won't solve.

Oh, as I said X6 has some good stage ideas, with the acid rain/darkness with only partial lighting stage shows, or the compressor, or the one in the museum, etc, but they just put the difficulty up so high... the last MM game I got that was this hard was MM&B, and I gave up on that one before beating four main levels.

Doesn't dissuade me from wanting Mega Man ZX, though. Though I don't know if that one's as hard as the Zero series was...