Gotta go with the others, I can't decide on just one, but for the sake of the vote, I gotta go with the skulls and crosses gig. I am SO tired of that! Geez, I dare you to try to find a better way to easily, quickly and cheaply c*ck up an otherwise good-looking rig... what are these fools thinking?!
For my part, I have to confess- my 550 came to me with the K/Q seat, long fork on a stock frame, and chrome finned engine covers. I ditched the wrist-twisting pullback bars for stockers, got a set of stock forks, pitched the K/Q seat in the trash, and it looked a lot better. I have to admit I did try the apehanger business, but if you know of a better way to give yourself a really good lower-back wrenching, I don't want to hear it. :-D Needless to say, those got sold in short order.