I'd say mine would be (in no order):
1. "You're Not Here" Heavy.
2. "Tsugaru" Heavy.
3. "Holic" Heavy.
That's about all I can think of off my head.
"You're Not Here" is fun because its steps are somewhat unique - I especially like the beginning, where there's a heavy use of freeze arrows paired with a lot of other things. It just works. I also like the gallop parts as well, and the song itself is just a good song.
"Tsugaru" is obvious for anyone who's played it. It just has a nice rhythm and the long strings of gallops is just fun and the steps are so perfectly matched to the song.
"Holic" has some crazy although easy (once you get them) steps. At this point I think if I really pushed myself I could A star or AA this song. I've gotten about a 200 hundred combo on it before anyway. Again, the steps follow the beat almost exactly which is something I seem to love with songs (I don't like Chaos! Chaos bad!) Fun song to dance to.