Just don't go overboard with that stuff man. I've seen many cars get out of hand with blingy chit everywhere. To me the e-brake handle, bullitt pedals, turn signal/tilt steering pieces, door lock pins, HVAC knobs, and the cup holder parts is all you need to really make the interior stand out.
I personally don't really like when people do the window switches, defrost button, headlight switch, etc... just gets way too over the top for me. I even think the hvac knobs look like a little much sometimes
but you know what they say, opinions are like a** holes...