All depends on what your into. I've gone for the Off-Road look with Brush Guard, Auxiliary driving lights, tail light guards, and a healthy coating of mud when I can find a large enough puddle.
I've also seen very nice street ride looks. Low profile tires on 20" custom rims, spoiler, tinted windows, smoked lights, and more.
All depends on what your style is and the kind of look you are going for.