If you love authentic-style Mexican food, this is for you. I tried this the other night, and it's fabulous. Get a pork tenderloin or Boston Butt. Cook it in the crock pot with a packet of taco seasoning, some cilantro and a can of rotel tomatoes.
Take it out and pull the pork. Saute the pork in olive oil, salt and pepper ( and maybe a couple spoonfuls of the juice from the crock pot), until slightly crispy on the outside of the pork pieces. Spoon into soft taco shells.
Top with fresh guacamole, lime (THIS is important- great taste!), and diced cilantro and onions. You can also add fresh salsa and shredded pepper jack cheese if you want.