During warm weather, i'll ride around on my harley with my Glock 21 or CZ75 9mm in a fobus paddle; some days I get plenty of looks in traffic, some from cops, and other days nobody seems to care.
Last summer, I was on an off-ramp from I40 going to Wyoming blvd, was stuck at the light, I had a guy roll up next to me, roll his window down (he saw me with my glock) and he said "hell yeah, man, hell yeah!", smiled, and drove off. Was pretty cool. Would be nice if more were openly positive about it like that guy was.