I was joking around with my Magical Commando Engineer thread and I droped in a Castlevania reference that got people thinking about Castlevania.
And well, one of the classic dungeon running themes is basically the Castlevania plot with more characters. I can't tell you the number of times I've pulled out Rondo of Blood & Dracula X's theme music to get my players in the mood for a good old dungeon craw.
My Commando Engineer games really benefit from 80's action themes. It fits the mood of the group. Metal Gear Solid's various themes also fit. The high action impact fits the sneaky stabby mentality of my players.
I've dabbled with Final Fantasy themes (pre 10) to meet my needs as well as a wide range of music form videogame RPGs. (Sega tends to be the most robust interesting enough.)
I've got some top selections and the themes they help generate:
Grandia 1&2 - Exploration (It fits Kingmaker so well.)
Metal Gear Solid (1&2) - Espionage (So many APs this fits with. Vs the ninja parts of Jade Regent benefit from this.)
Wild Arms (1-5) - Frontier adventure (Exploring Varisia, running in the mana wastes, all great themes for this.)
Castlevania (Dracula X, SoTN, the gba/ds games) - Dungeon exploring with spoky beat (Carrion Crown or any spooky dungeon themes a must.)
Ar tonelico (Any) - The series themselves are kinda weird, but get the soundtracks. So epic it HURTS! if you want epic otherworldly chanting, this is where you go.
Suikoden (3-5) - Empire (If you want to play up poltical power and sweeping changes in nations, this is the set to go for. If you can find it.)
I also like some Anime themes:
Escaflowne (4 original CDs) - A mix of jpop, but the rest of it is great for grand epic battles and deep exotic chanting.
Record of Lodoss Wars (again, good luck finding these 3 CDs) - The series was inspired by a D&D game, It's very fantasic, very sombere but just perfect for setting a classic adventure mood. I consider this my default "go to" for mood setting.
Movies:
Too many to list but recently-
Brotherhood of the Wolf - Action (So fitting, and very dark. Fits my style games a lot better than airier fantasy themes.)
So, I ask you GamerTalk?
What themes and music do YOU use as inspiration with your groups? What soundtracks and what themes do they evoke?