darkSpyro

Mine:
Spyro the Dragon - Lofty Castle
Spyro 2: Gateway to Glimmer - Scorch
Spyro: Year of the Dragon - Midnight Mountain
Spyro: Enter the Dragonfly - Dragon Realms
Spyro: A Hero's Tail - Cloudy Domain and Stormy Beach
The Legend of Spyro: A New Beginning - NOT PLAYED
The Legend of Spyro: The Eternal Night - NOT PLAYED
The Legend of Spyro: Dawn of the Dragon - Twilight Forest and Guide you home
Skylanders: Spyro's Adventure - Dark Water Cove

Far too many good ones in each game to list them.

Even "Enter The Dragonfly" had some good music.

STD: Lofty Castle <3
GtG: Don't know. Probably Glimmer/Opening.
YotD: Fireworks Factory and the speedway music.
ETD: Honey Marsh
AHT: Cloudy Domain

I never liked any of TLOS's music and I haven't finished Skylanders yet.

Let's have a try, to be honest, I may just put down what's most memorable, because usually they are the closest to being the one I like most. (By the way after finishing this list, I've remembered other tracks but can't remember what level they're from)

Spyro the Dragon - Opening Theme, Artisans, Dark Hollow, Toasty, Sunny Flight, Twilight Harbor, Gnorc Cove, Metalhead.
Spyro 2: Gateway to Glimmer - Glimmer, Sunny Forest, Hurricos, Aquria Towers, Autumn Plains, Winter Tundra, Robotica Farms, Metropolis, Ripto, Dragon Shores.
Spyro: Year of the Dragon - Opening Theme, Sunrise Spring, Sheila's Alp, Buzz's Dungeon, Midday Gardens, Bamboo Terrace, Evening Lake, Midnight Mountain.
Spyro: Enter the Dragonfly - Dragon Realms, Dragonfly Dojo, Cloud 9.
Spyro: A Hero's Tail - Opening Theme, Dragon Realms.
The Legend of Spyro: A New Beginning - Opening Theme.
The Legend of Spyro: Dawn of the Dragon - The Valley of Avalar.