I'm 5'11 myself, I don't really care about height too much. I'd rather date a girl who's taller than me and has a great personality than a girl who's shorter and a total bitch. If it feels right I would definitely not turn a girl down just because of her height. Sure it might be a tad awkward but if he/she can accept you for being so short/tall, I'm sure you can return the favour!
I'm 6'3" and tend to go for shorties. I don't really know why, they just always win me over. =P There's no perfect height in my opinion. I don't judge girls on that. I just work with whatever I've got going.