JB Burger is really good (it tries to copy In and Out's style, it doesn't get to that level, but it isn't bad, quite tasty actually).
Order the double cheeseburger, plus they sell Dr. Pepper. Yay!
JB Burger hasn't been mentioned in this thread so I will give you the address, if you like In and Out Burger, this should be a passable replacement:
No. 2, Lane 345, Alley 15, Renai Road, Section 4
The Diner's burger is really good, a bit on the greasy side, but they keep it real (no stupid toppings), and they too sell Dr. Pepper. Yay!
Then there are always the 'McDonald's on steroids' places (Friday's, Chili's, Outback etc...). They are passable burgers.
Mary's Hamburger in TienMu is ok. Nothing to write home about but better than Mackers.
Fast food wise you gotta go with the Hanbao Wang. Whopper cheese ain't nothing to fuck with. Top shelf.
Forkers has a really good selection of burgers, menuwise it is the most impresive, but the bun they use cannot handle the toppings and falls apart before you finish. Plus when I ate there they used frozen pre-fab patties which killed it for me.