Mostly orchestral but generally any OST you thought was great. Videogames, films or otherwise.
Speaking of which there are two videogames I played recently with some of the finest orchestral pieces I ever heard these are -
First and foreMOST - Journey - incredible game and in terms of OST you would be challenged to find better once you play through and realise how perfectly it fits, I mean the comments alone on the video I will share speak of people literally buying a PS3 and the game JUST from hearing the music...
[youtube]ypNgvc6c6Cc&NR=1[/youtube]
The other is of course, Shadow of the Colossus. For similar reasons (not quite up to par with Journey, but its still a class A effort)
[youtube]147rTHgKmXY[/youtube]