When I first went to university from Malaysia, I still took care of what I wear to class everyday and could never understand how anyone could wear pajamas to class.
The only pants that almost resembles a pajamas pants was yoga pants. Those were comfy but yet not too casual that you'll fall asleep immediately after wearing it. Love those pants!
Alas.. fast forward 3 years and all I wear these days are sweats... =.= I know some guys complain about girls on campus not taking care of how they look and stuff but seriously guys.. if you can't like a girl at her most comfortable attire.. em.. yeah.. we don't want you either.
But yeah.. I need to get used to not being able to wear sweats everyday now after graduation.. =(