I don't care how little time they assign. I know that when I rush, I am more likely to make a mistake.

Show up and do all your required work to get the plane ready to go. All of it, the maint log, review MEL's and brief any required flight crew actions, confirm that required maint actions have or will be accomplished, review weather and confirm legality of the dispatch, thorough pre-flight inside and out, both pilots check the box etc etc etc. I don't care when the published departure time is. I don't care what the agent says as I am not responsible to them. If they have something snarky to say, either call their super or ignore it. But in no case will I hustle for them. Maybe I just got off a jet on the other side of the terminal? My allegiance is to my license and the safety and comfort of the pax in the back. On time? Who cares?

Guys who rush for UCH give me a spastic colon.