Have spent a fair amount of time in Albuquerque, where it takes effort to get through a day of restaurant meals without eating some combo of chips, guacamole, pico de gallo, cheese, sour cream & jalapeno (fresh and/or pickled). Result: I'm addicted to these things & a simple plate of nachos is the ideal way to mainline them.
The best I've had around here lately have been at Redbones (nice surprise!). Cambridge Common and Qdobo tie for the worst; the former used bell peppers (why?) and the latter, liquid cheese, a sprinkle of cold cheddar and drenchingly wet pinto beans. Cantina Mexicana fell in the middle (lots of cilantro, but zero fresh tomato).
Any other hapless addicts have good tips?