Okay, this isn't necessarily my absolute definitive Top 5....but 5 I'd definitely like Hasbro to see, and make. I'll try to consider which I want more. And this list considers those that aren't out yet, but have been announced--including the Rebo trio.
1. Squid Head
2. Gamorrean gaurd
4. Ellorrs Madak
5. Myo/Djas Puhr/Zutton/Nien Nunb (Tied. :P)
A big ol' Jabba just might be nice, too.