Rim brakes please.
Although I do have hydro discs on one of my bikes, discs merely present another hassle that I would rather not deal with. Dishing of the front wheel, more dishing or the rear wheel, bleeding of lines, another thingy to align correctly...bleh. I'm a year round commuter and see rain, snow, ice, salt what have you and rim brakes are perfectly adequate.
If you're in need of that instantaneous bite for emergency braking that hydro discs offer in rain, snow, ice etc I'd say you're already going too fast for conditions anyways and are asking for some hurting either way.