Associate
There are a few things that put me off AF:
1) From all accounts their burgers are basically giant piles of slop. I'm sure this tastes great but I want a burger I can eat without a spoon.
2) Their website and attitudes are extremely annoyingly hipster to the point of absurdity. It really puts me off supporting them as a business.
3) The whole "we're so awesome that you can't book and you must queue outside for ages" attitude also annoys me.
Despite all that, I do plan to try them some day. If it weren't for the above I'd have no doubt already been there many times.
I agree with your second and third points but not your first. It depends what you order.
The greater northern one is just as good as the northern quarter one if you did want to try it.