ok, i noticed,that you are not from that kind of guys, who cares about negative comments and critics, so you know what? i dont give a damn
first of all things i like:
i really like style, and atmosphere. Idea of the whole chop is really good. BUT:
1 you messed up perspective. esp. on front bumper. There is simple trick. take 2 points on bumper and draw a line. Then you will see, how whole bumper should be. Now it looks, like one side of the bumper is a lot lower than the other.
2. wide bodykit doesnt look wide for me. you just made wide fenders, but you did not put wheels widely. looks weird, and reminds me of audi allroad versions
3. when you cut whole car, you left white edge around seats. The trick here is to cut just a little bit closer to the midle. Be patient, use pen tool and close up whole workflow as much as possible. It will took a while, but results will be much better.
4. C/P parts are in really bad resolution. you cna see noice and blur on them. If you post image, that is 1800x1200 size, then make it look good and without low res parts. Thats a huge turn off for me
5.Rear wheel are in bad angle. look at the base and your chop. you will see the diference.
6. and most importantly, when you are croping background, make sure it will fit the car. not just angle but lighting too. Use BG donors, that already have cars, and use that cars for reference. Play with gradient map, color levels, brushing, use all you could, but dont make car look like parked in front of photo wall.
I know, your eyes can be deceiving. I use simple thing here. once in a while i took whole image of the chop and make it mirror. then i see my chop, like other people would see. With "new eyes" . Hope it will help you.
And you remind me one of Chopers from my country. He also didnt cared about critics and tips. And in 6 years he never reached even average level.
P.s. Sorry, my english are really terible, hope somebody will say something similar but in more fluent way, than i did