Sorry to say, but the Fallout 3 soundtrack was very very generic and uninspired compared to the original one. Not saying Inon Zur is a bad composer, but he just failed at creating the correct atmosphere. The newly composed ones in Fallout: New Vegas were nice though, he experimented a bit and it went good. Also, what has that Tranquility Lane soundtrack to do with a postapocalyptical atmosphere? My favorite ones are the Necropolis one for it's "creepiness" - sounds like total desolation and absence of life, same as the Desert Wind theme. I like the Modoc Theme for it's melancholic/hopeless structure and the Arroyo one for it's sounddesign.
Nobody remembers this one: http://www.youtube.com/watch?v=ZtB8bL6NAL4&feature=relatedThat's what youth is like nowadays, they never care about History, they don't remember the humble past of the now mighty New California Republic