I really want the ML Soundwave set.

 

Hoenstly, my favorites are the Hound and Ravage set. They're the only ones I've fully applied:

 

That Hound/Ravage set looks great!

One of my personal favorites is the Movie Ratchet upgrade set I applied to my customized Best Buy Ratchet. It has lots of cool little details. I left off several of the chrome parts since I'd painted them, but it's still a cool set. Only missing the big "Search and Rescue" off the hood. The metallic paint on Best Buy Ratchet doesn't photograph too well, but in person the labels blend far better (I trimmed most of the green off the red stripe which was a pain to apply).

I'm also a big fan of the Animated UM/Jazz/Sentinel Prime upgrade set as far as design, but my set was horribly disappointing in execution. Most of the labels peeled off by the end of the day, the colors are bland, they seem to be printed at really low resolution and on really thin paper. Don't know if Reprolabels had to change stock to cut costs or what, but sadly, I haven't ordered since I got that set in October or so.

Anyway, here's Ratchet!

 

I'm beginning to really like looks of the G2 set for RTS Jazz.