right now i only have a crappy pair for day use, but i have some decent safety glasses for night. i have yet to find sunglasses that aren't too expensive, don't break, fit me, or all of the above. i'd prefer interchangable ones, but replacing my helmet is my first priority, and getting better shorts my second...
i've been riding with eye protection almost 100% of the time for a while now, and often explain to others why it's a good idea. once i do my "trying-to-steer-with-something-in-my-eye" impression, people usually understand.