For those who have been experimenting with different tire pressures, what is your optimum tire pressure for the stock 18" Bridgestones in warm weather?

I have found 31 psi cold/ 35 psi warmed-up to be a reasonably good compromise between the bumpy/bouncy ride.

 

I used to run it at 28cold just to keep if from beeping at me all the time. the ride was probably more bouncy than it needed to be, but it didnt bother me much.