1. mount wario
2. hyrule
3. rainbow road (snes)
4. bowser's castle
5. toad's somthing (not turnpike)

1- Sunshine Airport: I love the music in that stage.
2- Excite Bike Arena: The remix music for it is excellent, and I love how the stage changes each time you play it.
3- Hyrule Circuit: The music is excellent, and the stage is so well made : ) Nice attention to detail with the rupees too.
4- Dolphin Shoals: I love the sax part near the end of the race. It`s my fav part to get to in the track.
5- Mute City: The stage is so excellently made and feels so fast pace : )

1）Sunshine Airport
2）Dragon Driftway
3）Electrodrome
4）Rainbow Road(N64)
5）Mute City

at least two of the tracks in pack 2 will probably made it into the top 5 list, they just look so good!

In no particular order:

1. Mario Kart Stadium
2. Shy Guy Falls
3. Sunshine Airport
4. Excite Bike Arena
5. Mute City

1. Mute City

2. Mount Wario

3. Dragon Driftway 

4. Electrodrome

5. N64 Rainbow Road

I surprisingly love Mario Kart Stadium too. It is the first "first course of the game" I really enjoyed in all of the Mario Kart series.

Toad Harbor. :)

Donut Plains
Rainbow Road (SNES)
Toads Turnpike
Yoshi Valley
Royal Raceway

1. Electrodome
2. Mount Wario
3. Cloudtop Cruise
4. N64 Yoshi Valley
5. Sweet Sweet Canyon

Toad Harbour you mean. I thought you of all people would know this, being an expert in all things Toad. :p