This thread caught my eye since I'm 5'8 and have been dating a guy who's just over 6'6. (I guess I should say 198cm since he's European and that's how he says it.
) The chemistry has been excellent. I've dated guys in the 6'3-6'5 range and the contrast has always been pretty hot for both of us. A few positions take a little more to ensure they 'work' but it's worth it; I would say hottest is legs up on the shoulders, since because of his long torso my legs can't really bend at the knee, instead fully extended with ankles usually on or near the shoulders. Makes the difference really apparent. I wouldn't necessarily say I've got a height fetish though, since I like guys around my height also, even a bit shorter in fact -it's funny actually, it's the guys squarely around 6' that kind of don't draw me, since they tend to just make feel short without the bonus of the extra contrast, haha.
It's kind of funny how height doesn't seem to correlate in any concrete way to cock size, though. The biggest I've ever had (ridiculous girth on top of extra length) belonged to a 6'3 guy, but second-biggest (also extra thick) was a 5'7 guy.