Mine are in no particular order either :
World of Warcraft - Cinematic Theme
World of Warcraft - Undercity Theme
World of Warcraft - Thunderbluff Theme
Chrono Trigger - Memories of Green
Chrono Trigger - 600 A.D.
Chrono Trigger - Peaceful Days
Diablo - Tristram
Diablo II - Toru
Diablo II - Harem
Diablo II : Lord of Destruction - Destruction's End Theme
Fable - Temple of Light
Fatal Fury 2 - Wolfgang Krauser (Dies Irae)
King of Fighters 95 - Fatal Fury Team's Theme
Final Fantasy VI - Terra's Theme (and all its variants)
Final Fantasy VI - Opera Sequence
Final Fantasy VI - Searching for Friends
Final Fantasy VI - Town of ZoZo Theme (I think thats how its spelled)
Final Fantasy VI - Gau's Theme
Final Fantasy VII - Holding My Thoughts In My Heart
Final Fantasy VII - City of Ancients
Final Fantasy VII - Under the Rotting Pizza
Final Fantasy VII - One Winged Angel
Final Fantasy X - Hymn of the Fayth (and all its variants)
Final Fantasy X - Suteki Da Ne?
Final Fantasy X - Ending Theme
Phantasy Star Online - Can Still See The Light
Phantasy Star Online - Empty Space Out Of Control Pt. 1
Psychic Force - Opening Theme
R-Type Final - Final Boss
Shenmue - Nozomi
Soukaigi - Angels Fear Again
Soukaigi - Quake
Soukaigi - Riot Emotion
Soukaigi - Sign
Soukaigi - Labyrinth
Soukaigi - Broken Memory
Soukaigi - Lovely Strains
Sonic CD - Sonic Boom
Sonic Adventure - Mystic Ruin
NiGHTS - Gate of Your Dream
NiGHTS - Dreams Dreams
Sonic R - all of the vocal tracks
Daytona USA - Theme
Battle Arena Toshinden - Eiji's Theme
Battle Arena Toshinden - Sofia's Theme
Battle Arena Toshinden - Sho's Theme (Toccata and Fugue)
Battle Arena Toshinden - Gaia's Theme
Battle Arena Toshinden 2 - Eiji's Theme
Battle Arena Toshinden 2 - Rungo's Theme
Battle Arena Toshinden 2 - Vermillion's Theme
Metal Gear Solid - The Best Is Yet To Come
Final Fantasy XI - Windurst
Final Fantasy XI - Rulude Gardens
Final Fantasy XI - Ronfaure
Final Fantasy XI - Yhoator Jungle
Final Fantasy XI - Kazham
Final Fantasy XI - Saruta Baruta
Guilty Gear XX - Awe of She
Guilty Gear XX - Noontide
Guilty Gear XX - Holy Orders
Lineage II - Sanctuary of Light
Lineage II - Tree of Life
Lineage II - Autumn Festival
Lineage II - Forest Dawn
Lineage II - Knights Return
Lineage II - The Call of Destiny (Intro)
Lineage II - After the Storm (Outro)
King of Fighters 96 - Psycho Soldier
King of Fighters 96 - Geese Ni Katakori
King of Fighters 96 - Big Shot!
Zelda Ocarina of Time - Temple of Time
Zelda Ocarina of Time - Bolero of Fire
Zelda Ocarina of Time - Forest Temple
Zelda Ocarina of Time - Serenade of Water
Zelda Ocarina of Time - Gerudo Valley
Zelda Wind Waker - Earth God's Lyric / Medli's Prayer
Zelda Wind Waker - Makar's Prayer
Not sure which zelda in particular the "Hero of Time" theme comes from, but I love that one also
Warcraft III - A Call To Arms
Capcom vs SNK 2 - This is True Love Makin'
Street Fighter II - Ryu's Theme
Street Fighter II - Ken's Theme
------------------------------------------------------------------
Then there are remixes and so forth hehe... I'm sure these arent all the songs I like, but you get the idea