As for me, my vote goes to Laurier. Both sides are terrible - on the westbound side, there's nowhere near enough room between Tabaret Hall on the U of O campus and the edge of the sidewalk - the fact that it is both a sidewalk and a transit station means that it's annoying (and sometimes feels almost dangerous!) to both walk past the crowds of people, and for said crowds to reach their bus while stepping around people who are passing through.
The eastbound side, on the other hand, suffers from being just after the lights at the end of Mack King Bridge, meaning that during rush hour, all the buses tend to get piled on in spurts, making it difficult to pick out which buses, if any, are ones you need. I realize this happens at all downtown stops, but to me, it seems particularly bad at Laurier for some reason.