Tied first place: MM and
TWW MM's music was wonderful, catchy, creepy... Everything, and the music always fit the mood of the place it was played in.
TWW's music was awesome, it was almost always catchy and cheerful, even the music that wasn't cheerful sounded good. :D
I often just randomly whistle songs from both games. xD
Second: TMC
See
TWW, there were some tracks here that I didn't like that much, but the rest were just as wonderful as the ones in
TWW.
Third: OOT
Obligatory Lost Woods, Gerudo Valley, Lon Lon Ranch, Goron Village... Etc. XD Most of the music you could hear as Young Link was amazing, the music in most of the temples/dungeons were horribly boring and dull though. >_> Only like the Forest Temple and the first Fire Temple music of those.