Mega Man for NES1. The original Mega Man is the second best game, but I rank it 1st because it was the beginning of ALL. I love some dramatic tunes there.
No energy tanks, spikes are always insta-kill. Bosses are hard, unless you do a trick with the P weapon and a good timing. The Iceman' stage is the hardest one.
2. Mega Man IV is my best. It brings the original feeling in a few moments (like the boss chosen music) and vibrato in various tunes. An improved version if compared with all the others. No idea why people complains about the Mega Buster here, by saying "the best buster is in MMV". Oh well...
The music uses some kind of "echoes", making even nicer than ever. It's also hard, a patterned sequence must be followed in order to kill Ringman, for example.
3. Mega Man VI is my third game. I got my cartridge after my Super NES.
They've resized the M.Buster and... his shot sound was overlapped by the single shot sound, aww! Anyway, nice tunes and balanced difficulty, I'd say Flameman' stage is one of the hardest in the game. Nice tunes and a few MM2 elements too. The boss chosen screen was overloaded with boss information, kinda crap. Difficulty level is medium.
4. Mega Man II is the next one. First time I played it (in 1990), I was "shocked" because it hadn't a score! At anyway, it was a classic. A very good game, starring the password system and E tanks (max. of 4), nice tunes and colors. Bosses are medium-to-hard, I'd say Quickman and Crashman are the hardest ones. Dramatic ending and tune!
5. Mega Man III is also the "incomplete game". In his release, it was very cool to listen the new sound effects and the new music style, less dramatic. Rush Jet was unfinished, so you can fly around freely. Bosses are picky, specially Needleman. It has classic tunes, but in another style. It's the first longest MM game - after beating the 8 bosses, you revisit 4 revamped stages and bosses from MM2! Ay anyway, average only.
6. Mega Man V is the last one on my list. A poor weapon system, a few MM3 elements... nice graphics, but not so fun like the others. Music is just ok. People say this version has the best M.Buster, bigger and cooler. The castle bosses are pretty poor. New elements include smaller boss doors, Beat bird (you need to collect medals M,E,G,A,M,A,N,V in the game to unlock it), new M.Buster, Charge Kick is activated by sliding.
7. Mega Man VII (Super NES) is, in short words, a toy-like game. Game elements were oversized - Mega Man is too big, everything was increased. Springman' stage is like a toy paradise. Weird. Good because "it's a MM game" - just don't take it true for MMX7, ok?
MY MM LIFE- I'm sure that I played Rockman 1 around 1989, thanks to a neighbor boy that has the cart and we trade them for a few days. Next was Ducktales, then Rambo. Thanks to him, I could play classic NES games. I got Rockman 2 a few months later in a supermarket. All the games weren't originals, but made by NTDEC for a NES close console named "Top Game", most of them were japanese copies. Yup, a couple of other NES clone consoles were popping up with the time! As I said, when I played Rockman 2 for the first time, I wonder about the missing score system. I did a big "MEH", but later... a lot of fun!
The other MM games were got thanks to school boys. We bought magazines (no internet that time), we rent pirated copies (heh), I played with friends in their houses... and found Super Pitfall, another "bad, but classic" game.