Skyrim showed me something. I choose many games based on how they look, but I usually enjoy the ones with a nice soundtrack.
The other game which was like that was Homeworld, which I chose because it had spaceships, but played because of this.
I was finding the game nice and all, but it was still a game, with builds, quests... you know the drill.
While fighting my 2nd dragon with arrows and fire flying everywhere. my dovakiin charged the beast and the dragonborn theme starts playing... shit got real.
For that brief moment it was not just a player and a computer. It was a dragonborn trying to kill an ancient beast, and it was awesome. Even if the rest of the game don't live up to this, it was enough to made it worth playing.