I cannot abide khakis. I know they're perfectly acceptable for some situations, but I will never own khaki pants. I may one day buy a khaki-colored wool suit, but I have never seen an outfit with khaki cotton trousers that I liked.
Here in higher-ed biz-cas has really just degraded into casual. I see everything on a daily basis. Khakis and a button down puts you in a pretty high class of dress 'round here. But it's mostly dad-jeans and polos.