Since you're talking about summer, I'd say go with something you can be active in. Lowtops would be good for ventilation, and you can't go wrong with some athletic shoes. A lot of people sleep on Asics/New Balance/Saucony, and those shoes are comfortable as hell, especially if you're doing a lot of walking.
its not summer any more lol! but thats okay depending on your style i would say CONVERSE (people need to learn how to spell, lol) nikes dcs, ethics, uggs, really anything you like, you should get the coolest shoes, just get shoes you like and they will look amazing!