Yes, IMO, Khalin, most Mega Man soundtracks are pretty awesome. There are definitely some that aren't though.

The main thing with Mega Man's soundtracks is that the ones for the NES games in lots of cases did things that no other NES games could do with regards to game music, which is why the series' soundtracks are so respected.

Also, Khalin, you definitely have to play the Legends series, ZX Advent, the Zero series, and several other MM series games. Classic and X are all well and good but there's other great MM games just waiting to be played! ;D