I have around 38-40 psi in my tyres depending on what I'm doing.
Lower profile tyres need more pressure because of the stiffer sidewall. This prevents the sides from rubbing out before the centre.
I do mostly city driving (approx 80%) and am just about to get some Toyo's put on this Saturday. The odometer reads just under 32k, and the tyres are evenly scrubbed out. They're a little less than legal atm.