I'm too lazy to select 10 but a few anyway:
-
Vagrant Story - Climax of the Graylands Incident
(VS is probably my fav OST of all the time and this track best describes it)
-
Shadow Hearts 2 - The Fate
-
Shadow Hearts - Ending Song
(Shadow Hearts series have lots of great tracks but these two stand out for me)
-
Baroque - A Style of Baroque
(I like other Baroque tracks more, but the intro was mesmerizing)
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Silent Hill 2 - Theme of Laura
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Silent Hill 3 - Breeze
(can't go wrong with Yamaoka)
Special mention:
-
Final Fantasy XIII - Blinded By Light (Long)
(this is so masterfully crafted, I love)