No plans for engine mods. Was thinking of exhaust, but once it came in I think it sounds just how I want it so I'm throwing out that idea. When it comes to exterior, I like anything black or dark grey. I have the carbon fiber trunk trim and think it looks great. Same with the wheels. I got a very subtle black rubber license plate border the other day and I think it looks great. BTW I debadged the left side of the trunk so all that is left on the back is the WRX. Lovin the look right now, maybe I'll even take off the WRX sometime in the future.
The big mystery is what's best for the interior. There's already a ton of red (dash, seat stitching). So my idea is that anything I add I will make blue. I got it with the blue footwell illumination, and I got a black shift knob with a blue WRX on it. I think it is the perfect mix. You have plenty of red matching already, and now I have the blue subaru logo on the steering wheel, blue writing on shift knob, blue footwell illumination, and when my nav is on the audio screen (which it normally is) it is also blue. Plus you can see a few blue parts of the outside of the car while you drive.
Everything is preference. Blue has always been my favorite color, and I think that if I added more red to the inside it would be a little overpowering and control my vibe a too much. I like my decisions this far. I'll take some interior pics later.
PS. I got my shift knob through WC Lather Works and I would highly recommend him. I was very nervous with where to get my knob cause there are some bad reviews of certain guys. But I didn't see any bad reviews with WC, I emailed the guy (Chris) and he was always quick to respond and I even had some questions that he helped me with. I wanted to mention this cause I know what it's like shopping for the perfect shift knob.