what works best for you is best. I run 110 rear/ 105 up front. I weigh 220lbs. Too little pressure and you get too much rolling resistance. Too much pressure and your tires will skip along the road surface and cause "chatter" and loss of effective tire roll.
You will reach a happy medium in there somewhere and that depends on you, your weight, your bike, air temperature, your current tires and the road surface.

Higher pressure will help with flats from the tire compressing the tube against the rim(pinch flat) but will allow other things (nails, thorns) to puncture the tire easier.

Experiment and have fun.