Easy on the HDR junk!
Sure it's a fad but it still ought to die; the only one that's really terrible about it is the white speed in parking deck, it's just .. to much.
Some other things to watch out either when shooting or in post.. backgrounds.
Porsche in front of building is GORGEOUS, absolutely flawless looking, it's quite a pretty picture which sets you above everything... and then you get smashed back into reality with the ugly train in the background and the street lights and stuff in the reflections of the windows. You can only control so much taking a shot, but small things like that make a huge difference and are easy to fix in post.
Same goes with mustang; the background kills it. If you don't have one yet, look into getting a cheap 50mil 1.8
If you're running Nikon you can get some old school AI 50mils for damn cheap (sub $50)
Either way, a 50mil prime is a MUST, no questions asked. They are so cheap and can be so fast there is no reason not to have one.
Buildings are kinda nice but.. Urban Decay.. most overused current path in early photographers right now. Maybe because it looks so interesting to see some maybe abandoned building? I don't know but I do know everyone does it for whatever reason.
COLOR COLOR COLOR.. be careful; you are like me when I was beginning to learn; you're over saturating a lot of things in some colors pictures and it is to much information to handle and just looks... wrong; but no one can tell you why.. it's because there is to much color, and to much contrast.
One last thing
WATCH your blacks.
Some of them are absolutely mauled and you lose all information in them in post. Don't blow them out so much; and don't run a fill to charge them back up because that is what forms HDRs and looks weird.. you can bring some fill in, but lessen the blacks.
Your best picture is the Porsche out front (and would be much better if you went back and shot more of it at more angles). It is perfectly exposed, nothing gets lost in the darks, nothing is blown out, and it isn't over contrasted; meaning it looks.. right; almost as if you were there looking at it in person. And the surfaces make it just feel really clean.
Go easy on the wide angles; don't feel forced to use them to FIT (fit is a key word here) everything into the frame.
Crop everything out you aren't trying to depict. If you can't crop it, change angle, if you can't do that, use a faster lens. If you still can't, fix it in post. Do everything you can to fix things out in the field; never rely on post processing to fix the problems you could have prevented to begin with.
I hope these tips can help you, best of luck.
You can also check out my fan page on facebook I hardly touch anymore.
It's got some ugly ones in there, BUT.. what's nice is you can watch my progression which is a great thing to see and look for in other photographer's work. See where they came from and where they've gone to.