I prefer a single exit or hidden exhaust tip for a clean look.
I agree, this is my favorite style as well
Duals can look clean as well. On my Captiva the duals look nice IMO
My biggest preference is turn down/dumped after the axle. But the shop I used to go to wouldn't do it on my 13, he said it will melt the plastic on the bumper. I thought that was amazing because the same guy did dumped on my 00 and my dads 04 avalanche witch is basically all plastic. So I have duals out the back, I'm ok with it but I don't like it. I'll eventually redo it.