I noticed someone else made a post similar to this, but like, every single person picked songs from Final Fanatsy. That's not to say Nobuo Uematsu's work isn't good, but come on people, there is better stuff out there. Okay, so let's get this underway (shortened the list to five cause I'm lazy, XP):

1.) Festival of Stars - Chrono Trigger
2.) Redial - Bomberman Hero
3.) Big Blue - F-Zero
4.) Sand Canyon 2 - Kirby's Dreamland 3
5.) Que Sera Sera - Katamari Damacy

If I had to pick one song to listen to for the rest of my life, meaning I couldn't listen to any other song EVER, I would pick #1 from this list. I never get tired of it. It's just such a happy song. ^_^

Well
1)fallen leaves flute version-Star Ocean:till the end of time
2)Healing Winds-Soul Caliber III
3)Granado Espada-Sword of the new world
4)Still Alive-Portal
5)Train Ride To Hell-Gears of War
these are not my top 5 exactly they just really stuck out in my head when i thought about it

Hmm... Interesting. Depends on the mood, but I've come to this:

1. Return to Planet X - Timesplitters 2 (Graeme Norgate)
2. Born Bad - Full Throttle (Gone Jackals)
3. Griffith Park - Future Cop: LAPD
4. X-Ray - Dead or Alive 3 (Makoto Hosoi, Takafumi Inamori, Ryo Koike)
5. Forest - Bugdom (Mike Beckett)

Tried to vary it a bit. Great games, great soundtracks, great tracks :)

1. Thirteen O - AutoPilot - Descent 3: Mercenary
2. The Return of Asclepius - Manabu Namiki - Trauma Center: Under the Knife 2
3. Donpachi Squad Departure - Manabu Namiki, Azusa Chiba and Yoshimi Kudo - DoDonPachi Daifukkatsu
4. Classic Zen 4 - Phillipe Charon - Bejeweled Twist
5. Classic Zen 1 - Phillipe Charon - Bejeweled Twist

(I can't really hand pick my top 5, but here are some favorites!)
1. World of Goo - Best of Times (http://www.youtube.com/watch?v=01Ohnhakw3w#movie_player) (simply amazing, listen to it)
2. The Elder Scrolls III: Morrowind - Main Theme (http://www.youtube.com/watch?v=Ha6q4v2bwSs&feature=related) (Beautiful strings)
3. Aion - Sad World (http://www.youtube.com/watch?v=JjgYImEo0ik) (If you don't like this, you're not human, end of story.)
4. Mario Cart 64 - Rainbow Road (http://www.youtube.com/watch?v=hRuz2u9St-k) (Raced this level, just to hear it. Amazing!)
5. Alone in the Dark (newest) - Who Am I? (http://www.youtube.com/watch?v=nh2kSs89Xxw) (Amazing vocals, very powerful)
6. World of Warcraft - Totems of the Grizzlemaw (http://www.youtube.com/watch?v=JAFUBpuaL20) (This is probably hands down the most beautiful song ever composed)