Well...the poll says everything. This includes the two "weird" games, the legends series, and that racing game that you either love or hate. You can vote twice.
My votes are Megaman 2: The power fighters, and Megaman 5.
(For the fighting games, that is only 2 lives and one-player)

I don't really follow the concept here. Why this selection of games? They're not all of the same style, so comparing them for difficulty makes little sense. With the variety spanning platformer to racing, you might as well made the list include every game in the franchise.

6, for a real vote, and Power Fighters for obvious reasons.

I mean the fighting games of only having 2 lives and no friends to help you...then again, Duo's damn cheap...
I was going to include every game in the franchise, but there's a 15 limit. So I'm putting the series's that follow the 'original' Blue Bomber. And also, difficulty is fairly easy to judge from game to game. You'll always feel the same kind of frustration or boredom (from easyness) with any kind of game.

How the hell do the Legends games "follow the 'original' Blue Bomber"?

And maybe I'm just being a statistics snob, but how does the question of difficulty even factor into games in the original series grouping? If you wanted a selection that made any sense whatsoever, you could have picked all platformers, all NES-era titles, all from a commonly-accepted similar tier of difficulty, etc. Some kind of grouping that at least resembles a complete, cohesive set. I can't even tell what question this poll is supposed to answer.

Erm...I dunno, to be honest.
There were two Megamen!

Well, out of the classic games I've played, I'd have to say that Mega Man 3 is the easiest (I've only played Mega Man through Mega Man 6 and Mega Man 8 in the classic series, however). The stages were relatively short and some of the bosses had very severe weaknesses, such as Gamma's final form and the "upgraded" clones. (And some bosses were just plain odd or pathetic— c'mon, a turtle-launching machine?)

I notice that Mega Man & Bass 2 (the Japan-only Wonderswan game) isn't up there. (Then again, judging by Sean's incomplete guide for the game on the Time Trekkers' old site, I don't think that anyone would have voted for it anyway. ;) )

Yeah, Megaman 3 was easy, but there's a difference between that and Megaman 5 to me: I GOT A GAME OVER!!! (Damn Gemeni Man stage...)
I never knew Megaman and Bass had a sequal o_o

I played all the Classics from MM 1 to Rockman and Forte. Out of the easy ones, I would say..

Megaman 3
Megaman 2
Megaman 4
Megaman 6
Megaman 8

The thrid one seemed very easy to me for some reason, as well for Megaman 2.

I think the Wonder Swan Rockman and Forte Game was made by Bandai isntead of Capcom. I could be wrong.

Power Fighters comes in secondplace for being easy for me also.