Here's a few comments and suggestions I have.
#1 Needs color temperature adjustment. Looks too yellow. Too many distracting elements, maybe try cropping the big vents and poles out. Also maybe try a lower point of view. Looks like it's taken at eye level. I like the use of the puddle for reflections.
#3. I really like the idea here. Maybe a little higher exposure next time to pull a little more detail and lines from the car.
#5 is my favorite of the bunch. The blue bimmer really jumps out of a dull grey background. I'd crop some off the left (remove the distracting yellow on the poles) and some from the top.
#6. Pretty cool perspective here. Who's going to win making it to the end of the garage.
Looks good, keep them coming.