My skin is rough, bumpy and flaky (rather like sandpaper on parts of my arms and legs), and yet for some strange reason a good handful of people have told me it's soft. I look at them like 'WTF? Get some new nerve cells 'cause yours seem to be broken'.
I think the other ones I've gotten are the eyes (mine are big and 'change color' since they're hazel, and I have big lashes but they bug me sometimes 'cause they're too heavy and fall in my eyes), the lips (sometimes they're red enough that on rare occasions someone will ask what lipstick I use, but I never wear makeup X3), and the hair (though it's all flat and thinning prematurely due to genes ._.)
I don't think I really get comments regularly enough (nor do I pay that much attention to it all) to be able to gauge which I get the most. I think appearance-related compliments are mildly awkward more than anything. I'd rather people compliment me on my intelligence since it's a lot more important than my looks in my opinion.
My boyfriend gets complimented on his amazing hair a lot (actually so does my brother) X3