Return of Samus was the 1st videogame I ever played (I was 9 at the time) and maybe that clouds my judgement at least a bit, but the game's great anyway. I've replayed it dozens of times on my gameboy. It's the best black and white game ever in my book, especially because of the gameplay and skill upgrades! Though various kinds of monsters is also what attracted me much. Moreover I have to admit though I'm 26 and I'm not defective I still haven't had enough! I found a java version for my cellular and keep playing the game!
Metroid 2: Return of Samus is simpy a masterpiece and always the #1 game in my top games! 10/10