I am good with just the standard ingredients with lots of hot sauce on a hard shell. A taco isn't a taco if it is easy to contain the ingredients. I have never seen anyone eat taco dressed in a tux. It is all good.
Start with the hard shell cause soft shell are NOT taco's....sorry soft shell lovers. Then you add the beef, gotta have beef, and real beef...none of this plant base subsitutions. If you're going to have beef, then let have beef. Next it's the lettuce and tomatoes, all vegi lovers are proud of me for that one Then add the cheese, lots of cheese. Lastly, HOT HOT HOT sauce to spice it up a little or a lot And that's my Taco in a nut shell or might I say a hard shell.