Being a girl, I get to wear all manner of black strappy sandals. ;) I do have a pair of very sturdy and comfy sandals that I bought from Fluevog - they look a bit like Birksm but much more stylish.

My other go-to shoe for comfort and style in the summer has always been Converse. I think Nike owns them now (boo!), but No Sweat makes a damn good knockoff that is 100% union-made: http://www.ethicalsoles.ca/home.php