Standard-issue Tim Horton's, but this one I make a point of going to. One of the few Tim's in the downtown core that are open 24 hours, this Tim's found inside the older building front , is plenty spacious, and is manned with staff that don't give you a dirty look when you ask for a double-cup on your extra-large black.
They run the full Tim Horton's menu and have ample tables and booths so that you can eat in if needed. Though not as big as some of the small-town Timmy's, they're still able to get some decent throughput for the space. The staff are quick and efficient, so you're not usually waiting too long. If you are, you can typically blame the customer in front of you that's painstakingly picking every donut in his 40-pack individually.
The other cool thing about this place is that there's no drive-thru to distract the staff. You have to get out of your car, mount the stairs, and order your double-double the old fashioned way. The way God intended it.