Tom,
It depends upon what you're reloading. With pistol, it doesn't make much difference, except DO NOT, whatever you do, use Amerc brand brass. The stuff is junk.
I've found I like the military surplus brass the best, with Winchester and Remington a close second and Federal third when loading rifle. Greek military surplus brass is also very good. I avoid PMC and PMP for reloading anything but bolt action cartridges, as the one's I've gotten are very soft and the rims rip easily under semi auto extraction.
I generally use all brands, but separate by manufacturer and year and number of times fired while inspecting everything I reload after it's out of the tumbler.
Hope this helps,
Dave