I love Butter Building, too, but I'm still partial to MKR, and I daresay that the latter is more popular. (Although I would say that Butter Building is certainly underappreciated--it's fantastic!)
Hm... Tough call about FD. It's probably the "best" version of the main theme--not counting the original, of course.
Oh, my goodness. =O
I went this whole time without making a Banjo nomination!! I am ashamed... ;_; Seriously, Grant Kirkhope's work on Banjo was part of what inspired within me a serious interest in music.
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Banjo-Kazooie - Gobi's Valley (
I prefer the original to the version that you posted, but we'll see what happens. The latter is certainly more iconic, eh?)