I love fish tacos! they just scream "summer!" to me. There's a restaurant down the road from me that makes the best fish tacos but I also like to make my own. You really don't need a recipe. Just grill up some firm white fish(I like mahi-mahi) and add to a tortilla with accompaniments of your choice. I like Crema Mexicana, salsa, red onions marinaded in red wine vinegar, and avocado.
I do like the marinade from THIS recipe and use it frequently. It's also the recipe that gave me idea for using the crema and the red onions.