Why the hate?
I have honestly been having a lot of fun playing it. Granted, it does have some issues (it is published by Bethesda after all) Brink is a nice breath of fresh air. If anything it will tide me over for a while before I go back to waiting for Battlefield 3.
Bring some friends.
The biggest problem right now is the single-player. The AI is absolutely horrible; no one can deny that. A simple fix is getting a few friends, or setting your game to public. Or, since the multi-player also progresses the campaign, you could go that route.
Parkour, fuck yeah.
Although it can feel clunky sometimes it does provide a bunch of new strategies for moving up on the battlefield. I have yet to try it out on the consoles, but from what I have heard, the controls do seem pretty bad. All of the control problems can be avoided by using the superior mouse and keyboard.