At 6'6", I like my height - but it took some work. I've learned quite a few tricks for matching eye-lines with the people I'm talking to in social settings.

This generally includes leaning slightly at a bar, or sitting in / leaning on a stool while people are standing, or spreading my legs a bit while standing, or standing further back. I also still end up with a bit of a slouch on rare occasion - something that was hard to shake from my teenage years.

These things are all pretty habitual for me now, where I don't even realize I'm doing them.