[gmku]

The trouble with the way most men wear polos is that they wear them too big and tucked in. They should fit slim and be left untucked.

Regarding khakis/chinos, the big sin most men commit is wearing them pleated instead of plain front, and again, wearing them too baggy instead of more slim.

But yeah, generally, polos and khaki-colored khakis or chinos are not a good mix. Get into different colors, like white, grey, olive, blue, chinos they go much better together. For most of us, polos are easiest to do with jeans or at least jean-like pants. My favorite combo is a navy (slim-fitted) polo and white jeans.