Good game but a little rough around the edges. It's an early NES game and the first game in its series so it's not that surprising.
Retained the best aspects of the first game while making several improvements. The music is better, too. It still has balance issues, though (Metal Blade, turret boss). The fact that Capcom cannot stop sucking this game's dick gets really annoying later on.
Tried to improve on the second game, but it's not finished and it shows. Wily's Castle is a joke and it has the most technical problems of the NES games (slowdown, sprite flickering).
Definitely more polished than Mega Man 3. But the level designs are more obnoxious in this game and the bosses aren't very good.
The weapons absolutely suck in this one and the whole game just seems bland. But it has the best graphics of the NES games along with 6, and some of the best music too. Better than 4, but not by much.
The only problem with this one is that it's way too easy. Probably the best NES game along with 2.
It's okay. Really don't have much to say about this one, surprisingly.
This one's weird. No more E tanks, you can start at a checkpoint after game over, the game has bolts as collectables, there are a lot of cutscenes and Mega Man swims now. It's not bad, but it feels out of place.
This is where everyone's hard-on for Mega Man 2 gets really obnoxious. Mega Man can't charge his gun or slide anymore, because Mega Man 2. The graphics aren't as good as the later NES games, because Mega Man 2. A lot of the enemies and some of the music is ripped straight from Mega Man 2, because Mega Man 2. The game also has a spike fetish like no other. It's still fun, though.
Haven't played yet.
All of the classic series games are good. Play the Game Boy games too, if you get the chance.