Pork makes great tacos, but any meat must taste like it belongs in a taco. Carnitas and chicharonnes are wonderful taco meats. Smoked pork works pretty well and is complimented by roasted chipotle salsa. Your pork might need a little spicing up. Maybe try a little frying pan time with some spices (look for a tacos al pastor recipe) will give the pork that little extra spice and texture you need. A little cilantro, a little onion, a little salt, a little salsa (i like roasted salsa, not too tomatoey, and no beans or corn in it fer Pete's sake!) and you're in business. Fry or heat up that corn tortilla on a griddle till it bubbles.
"And the government promised me a posse, which I figure will be long on promise and short on posse." - Rooster Cogburn