I'm 5'7" - I have only ever dated one guy over 6' and he was 6'4" which was like standing next to a stork, even in heels.
I like guys close to my height it's something I'm really confortable with plus I like when our body parts match up (HUZAH!) so 5'7-5'11" is perfect.
My first and second beaus were 5'4" and 5'8" and my honey now is just about 5'11".
I laugh everytime I see a 6' + guy with a 5'-5'2" girl.
But that's just me.