Hmm... Metroid Prime 2 way way more enjoyable than 1 imo. One of very few games with such a long story mode that I actually fully replayed and enjoyed throughout. I guess the awesome multiplayer played a big part as well though ;)
OT: The greatest impact in gaming for me would be my first Halo:CE play-through. It's amazing atmosphere, exploration moments and fluid shooting action has never been replicated, again imo.







