They are one of my all-time favorites, but you don't see fish tacos on the menu too often. I have found (albeit in my younger days) they are at their best when they are a special order made just for you instead of for every patron in the restaurant. Making them in large quantities will make you sick. It is important to make sure the waitress does not offer then to all of her tables.
As a note to Mainah - I am sorry you don't consider lobster a delicacy. It is great and in most Maine seaside towns, it is a fraction of the price and is truly at its best from a taste perspective. As you may know form my previous posts, I come from NJ and we have very, very good local lobster (but not as good as Maine in Maine - Maine shipped elsewhere and staying in tanks for weeks just ain't the same). Many times when I fly out west I have my local fishmonger pack up lobsters for our forst night dinner. Our friends in the rural Rocky Mountain areas love it!