The first time I flew to Mexico City was late at night. I checked into my apartment and walked down the street and stumbled into El Farolito (this was about 15 years ago, yet the place still reigns supreme!). I sat up at the bar and ordered three Al Pastor tacos. They were mind blowing!
Although this type of taco originated in Mexico City, at Hotel Jesus we serve one more akin to the style of Guadalajara. In Mexico City they use a lot of achiote and nitrates (to make the meat more pink in appearance), where we use only a little achiote for a subtle flavour and no nitrates. Going simply by customer perception, no one misses those!