What about bright red? I have a bright red shirt and a red and blue striped dress shirt that I wear to work. I also have quite a few orange t-shirts.
I guess I should have qualified that; red, bright blue, yellow and Kelly green are great. Purple is not. Pink is just plain weird on a man. And most pastels make a man look wimpy, in my very opinionated opinion. I just prefer strange, unnameable colors.