Actually, whenever I've been in a place with odd lightswitches, it's been pretty annoying. First, if I have to figure out how to use it by trial and error in the dark, that's a problem. Second, if I'm expecting to live there for years, I'm going to have to replace them, and then, very likely, I'm going to have a bunch of wonderfully different switches, and one that stands out because I could get it at Home Depot, and I couldn't find anyplace to buy one like the others.

All that said, I prefer the wide rocker switches over the lever switches that I grew up with, so I'm not knocking change, just variety. :)