First off, I cant stand accessories that change the overall lines and look of a car, or just anything too gawdy like chrome fender trim, etc. that being said, here are some accessories I have which I feel still maintain a rather stock look. Only thing left is rims, but kind of liking my summer tires for now.
aluminum power window trim

aluminum center **** trim

tire valves

front seat belt

rear seatbelt pads

license plate screw covers