Looks are subjective, but I think G37's are u-g-l-y, inside and out.
Here in Calgary they are extremely common (much more so than a 3), and for some reason most G37 drivers act as though they have something to prove.
Unfortunately for them, the only thing they prove is that their car is much slower than my stock 335
Altitude might give me a slight advantage, but I believe they are slower even at sea level.
Also for tuning potential, the N54 is a much better platform.