Mixmaster, definitely. Wheelie sucks and, while '07 BB is a neat toy, I wouldn't call it a must-have. Sideways is a good figure but, at the rate that thing is peg-warming, you don't need to be in a hurry to get one.
I guess because while there are alot of great toys, there are always letdowns in the lot. People like to be aware of these i guess. I, for one, like getting the advice of the people who actually own the toy before I purchase it. I'm much more selective about buying ever since I bought Universe Galvatron.