Metroid Prime series personally. I was one who was sooo pumped for Other M, but it didn't have the same je ne sais pas that al the other metroid games had for me
Hmmm... I'll go with Metroid Fusion or Metroid Prime I Graphics, story, length of game, size of world are all perfect. Prime III had a lot of awesome too, but it also had some annoying bits to it as well... With Other-M I really really liked the gameplay and graphic feel... But the story... The story... *cringe*
