I think the rims look very aggressive, too brutal for a vehicle with so much style.
The paint colour is of course a matter of taste, but if an aubergine had wheels, it would probably look like this.
I didn't notice the lip on the front bumper. I don't find it disturbing.
Don't worry, it's nice that we all have different tastes. The important thing is that you like your car.

I kinda like the fork shape for the rims, I agree the colour looks a bit dim and I would prefer a shinier tone, but you can't repaint stock rims in GT5 unfortunately.
As for the paint job, is it really that bad ? haha x) I like that colour actually, I think that wine purple tone looks classy and match pretty well the sexy lines of the GranTurismo, but that's just my opinion.
My only regret is the front bumper lip, I thought it was cool at first, but the more I see it, the more I realise that carbon fiber really looks out of place on that car.

Maserati's are beautiful cars.
I would have chosen a more subtle design for the rims, a little more understated.
As for the color, I've got you signed up for tomorrow's design class at college. Name of the course: Colors you should never give a Maserati under any circumstances.