Out of the entire Classic series, what's your favorite stage and why? 

Mine would have to be Air Man's stage. I cannot tell you how many times I've gone through it.

Why I like it: it's one of those stages you can blow through extremely quickly with precise maneuvering. I like stages that you can rush through that aren't meant to be rushed. Videos displaying ridiculous acrobatics also catch my eye, so I decided to make my own one day (see below). I got so lucky at the end with Air Man's attack patterns. The second I stopped recording, I said to myself "lucky I got that on tape; that'll never happen again." So Air Man's stage is a great stage to pull off some crazy jumps, and that's why I like it. There are tons of stages that allow for this, but this one has always been my favorite. What's your's?

(P.S. I tried to make it obvious that I'm playing off of a TV/genuine NES and not an emulator, so that's the reason for the sub-par quality. I could have easily recorded this through an emulator, but that's no fun).

Oh man, I forgot to mention the Air Man stage tune! Thanks for the reminder. And thanks for the compliment!

The Wily stages in MM9 are great overall. I'd have to say they're my favorite Wily stages. I agree on the difficulty, too. They did a good job balancing that out in MM9.

Hard to pick just 1 stage from MM1-9, but my favourites would be:

Quickman (MM2) - Love playing through this stage and trying to beat it in 1 life, no flash stopper. Getting through the stage is second nature now.

Pharoh Man (MM4) - Mostly due to the excellent music and boss fight, I love playing this stage again and again.

Napalm Man (MM5) - Same as Pharoh Man

Shade Man (MM7) - Love the setting and the fact its a homage to the Ghosts n Goblins series, the fact it has multiple paths through the stage depending how you beat the pumpkin and the hidden GnG stage music

Jewel Man (MM9) - My favourite time attack stage, I really enjoy playing through it as fast as possible.

Lastly - any Wily Stage that has the Yellow/Green Devil's show up in any shape or form

My favorite stage is the special stage in MM9 cuz i just love it and I like fighting Police Man aka Fake Man followed by Concrete Man's cuz i can speed through it the fastest .......Does the endless stage count???? Im so addicted to that stage OMG!!!!!!

A stage that would be favorite (1-9) would have to be ice mans stage in Mega Man 1. This stage was extreamely chalenging for me at first, and it took a long time to get use to without the powerup that you get in electricmans stage. Overall I think this stage is perfectly balanced with the obsticals that you have to go through to make it to the end.