My favorite's probably Joy to Fall. It's the one I listen the most to, anyway. The music channel was a really good idea. It's to just listen to the same music all the time.
I used it to cheer up when I was mining for Cursed Accessories to sell for teh moneh!!! (You'll want to destroy something when you've just redug up the same floor for the 5th time or you fall down a hole before you're done digging every square, and have to redo it all... >:[ )
The other music choices are either slow or I dont like them... Sorry for all the off-topicness >.<
I have set up an epic schedule for myself in HMDS...
Spring and Summer: Grow crops and breed animals
Fall and Winter: Dedicated to mining and fishing
That way I don't get overworked!
/off topic
So many good songs... You mean I have to choose between those? I have too many favorites, but I guess my favorites are Flower Bud Fall, Joy of Fall, Summer Memories, and Butterfly. (I warned you that I had many...)
Oh, and there's some music I like that isn't on channel 5, when Takakura tells you that one of your animals just died, listen on; it gets very pretty. (I know, I'm odd...)
Oh and I never got the other music (the ones you can't buy at the beginning of the game). For some reason it never unlocked...
Well, mine has got to be Autumn HM. It makes me think of apples. Also Last Dance is good because it makes me think of MT and that I've just got married (I think it plays when you have just got married, I can't remember) and then there's Jolty it's just such an energetic song and then the Wonderful Life title theme and Walk which makes me happy (I don't know why) and Harvest Samba the sprite minigame song which makes me think of the MT minigames.