i'm still struggling from a lack of artistic flair tho, i just can't seem to get the flattering angles yet - i guess that will come with experience
At least here I can weigh in with some thought... As to the question, all I can say is, yes.
I've been looking at 1,000's of pics of exotics nearly every day for a long time, so when I see a car I just automatically know what angle looks good.
Even so, you might think you've found THE angle, take 10 photos of it within a few inches/feet of the angle you think is great so you can figger it out later when you get home.
Of all your let's say "arty" shots, the only on that really is decent is this one:
The shadows are deep, the focus is great, the highlights are few but perfectly set. Look at the way it accentuates the model, the badge, the headlights, those angry grill bits, yet the number plate which is often an unfortunate highlight in many photos is just part of the picture. And in the background is some great colouring with the Ferrari - way understated so it adds beauty to the shot without distracting from the subject.
Most of your other arty shots suffer from bad lighting, mostly too much of it. One trick I've found is to point your camera at something bright in the background or the sky *just* as you go to press the button a little to focus, this tricks the camera into reducing the light intake and can result in some really great dramatic shots, however that advice is worth absolutely stuff all if you know how to use the settings on your camera - which I don't. :\