Taqueria LES, on Orchard just downtown from Houston. Though it's an offshoot of a Jersey City spot, you'd think the owners were from LA with the crazy amount of 80s/90s Southern California decor. They were also playing "Ferris Bueller's Day Off" when I stopped by, and that wins you instant points.
The tacos there are all $3 and under, and I hear that the rest of the menu is stellar too. I focused on stopping by to try the fish. Though not the crazy size of Rockaway Taco, for $3 it was pretty awesome. Freshly fried with not too much breading, it's a compact, delicious little taco. Enough for a snack and small enough to mix and match for a meal, I'm surprised that more people haven't been singing their praises--it might just be one of the best fish tacos in the city.
198 Orchard Street