I'll admit to avoiding shorter characters, myself. But that's just because at 5'8" in a short family, I'm actually a little self conscious about my height.
In general, it doesn't matter all that much. I've seen more than one very good, rather tall Hiei. Not to mention the fact that Sebastian is on my loose to-make list, and I'm a couple of inches above you. You never know what height Sebastians you'll find to take pictures with. ^^