I absolutely adore the Metroid series.

Super Metroid was the first game that I made a speed run at, for, well, some particular reasons.

I thought that the new direction Retro Studios took the series was, overall, very well executed. Echoes was the weakest of the trilogy, but even then, the worst game was still enjoyable enough to play through multiple times.

I never played Fusion, so I cannot comment on that game.