For warm/hot weather (above about 70F) I wear relatively inexpensive tri shorts (5" inseam and a very minimal pad). I have three pairs of 'em and wear a different pair each day.

I actually do the same with the other riding pants I have as well (PI Infinity knickers and full-length running tights--some hi-viz bits with no pads--and with my winter tights by Vermarc). Having found these with the fit and features I wanted, I quickly acquired multiple pairs. Partially for rotation during a week, partly for flexibility (this morning I wore full-lengths, but packed along knickers in case it gets warm enough), and partly to help them all last longer. YMMV.