A few years ago, I wanted to start a list like this, and I still have that list- but looking back on it, I wonder what I was thinking. Oh, yeah, and of course, my list is going to be a lot of movie soundtracks and classical music- just because I'm more familiar with them and they set the "moods" of my life.
Theme from "Evolution" (on the score, it's probably "Firetruck"): I love music by John Powell- the music from Evolution just seems powerful and moving- heroic, in way that when I'm full of energy and well focused, this song comes to mind
"Casbah Shuffle" (by the Nuclear Whales Saxophone Orchestra): This is one of my favorite groups, so I have to include them. This is just a great song, not necessarily for any one particular moment, but I just like hearing it (sort of makes me want to dance- be afraid)
1812 Overture: I hate loving this song because I'm a big fan of Napoleon, and this song is all about his Russian campaign and his downfall. It's just incredible music (plus, cannons!)
Fish heads (by Barnes and Barnes): It's just hilarious.
Amelie theme (La Valse D'Amelie): I especially think of the "puddle music" where she dissolves into a puddle after seeing her love walk away.
Battlestar Galactica (original) theme: Same reason for Evolution- it's just a great song I get stuck in my head when I'm feeling good and have things to do.
My Weakness (Moby): This song appears in the X-Files episode "Closure." It's a very touching and sad moment, in which this song is perfect for.
"Sing, Sing, Sing," by Louis Prima: Another X-Files great song that matches the mood- in this case, it's a chase scene that occurs in two different times simultaneously (what I just said makes sense).
Lola: I just like this song. It's funy, and I've found myself humming it quite often. I blame "101 Reykjavik" for it, mostly.
"Boyd's Journey" from "Ravenous": It's a really weird song. It's nice music for those times when things are a bit confusing and you don't really know what's going on.
As an added bonus, I'll just add on "I Wonder Why the Wonder Falls" by Andy Partridge, just because Wonderfalls is one of my favorite shows and I like the theme.