Height IS a topic in our household. DH is 6ft 2, and DS's #1 and #2 are 6ft 4+ and 6ft 3 respectively. The men run on the slim side as well. I've never felt 'dainty' since even though tall, DH was so very slim! (Still slim, but not AS slim, now!). At 5ft 7+ I feel stumpy in low heels around the guys, but my fussy feet prefer a lower heel height. For social situations I get out the heels! Much easier to dance....
I did gravitate towards tall slender guys, but once dated a guy my height. He was easy to dance with, and to kiss standing up. He liked it when I wore heels! I also dated a guy who was a 'bigger' guy. He was incredibly nice to me, and very sexy! We were young, and still experimenting, so didn't date long. I sometimes wonder what lucky woman snagged him!
No issues with height difference in couples, though some of the extreme differences look a little off. More important things than height and weight for a couple to be compatible!