Not sure what it says about me but I struggle with listing cars I know I'll never be able to afford so my list is a bit more modest than some, and quite short:
Boxter Spyder (the latest one)
R35 GTR
Evora 400
The Z (seriously; I still love it).
OBD Car Doctor is a good free app that has worked for me with an inexpensive wifi adaptor from Amazon. It diagnosed and cleared codes on both the Z and our Aygo.
http://www.incardoc.com/en/Overview
https://www.amazon.co.uk/Stoga-Wireless-Diagnostic-Scanner-iPhone4S/dp/B00DYOVXZ0/ref=pd_lpo_263_tr_t_3?ie=UTF8&psc=1&refRID=EFXRWDJFGBCM5PGSKHAC
The total cost of this set up was less than £15 whereas Nissan wanted to charge me £100 to diagnose what I strongly suspected was a code being thrown by my HFCs. The app/reader combination enabled me to diagnose and clear the code before later getting the car remapped as a long term solution.
Ten quid wifi dongle and a download of the free OBD Car Doctor app has been one of my best investments. It correctly diagnosed the common issue with HFCs and the check engine light on the Z and a faulty sensor issue on the Aygo.
I'd sat my both variants of the Nismo are lower. It's not uncommon to catch the underside of the lip on a speed bump, drive etc but you'd have to be pretty careless to do it in a place that would be visible.
Bit too busy for my liking, but horses for courses and all that. The door looks a different colour to the rest of the body but is that just a trick of the light?
Interesting. The issue for me was the bracket for the third hanger on the exhaust. It sits lower on the underside of the Nismo and stops the Stillen exhaust lining up properly. The solution was to simply remove the bracket and reposition it at the right height.
I'm not surprised the Stillen has an alignment issue on the Mk2. Mine required some work to fit the Mk1 with the tips level. If you don't adjust it the left tip sits lower than the right.
Don't count your chickens...you might find that the fault returns when it gets colder. I had to do both the penny trick and weight removal (although the big Nismo mk1 spoiler probably accounts for that).