General consensus on wheel sizes?

[986Roadster]

I have 19z and Lil Bastard is 100% correct!

I used to push hard on here that 19z were the way to go. They look too
big on the car. Looking at the car from the back on an angle, the wheels
don't look good. The rear bumper is too small looking.

18z are the way to go. I've seen 18z on a Boxster and from far could barely tell that they were 18z....looked like 19z.

I will most likely go back to 18z. The overall ride is decent.