The only time I ever spent in the states was in San Francisco. I spent the first week there in a dorm room sick thanks to the sea food linguine served on the plane.The second week I put back on all the weight I had lost thanks to the local burritos. Best I've ever had to this day...in fact I think I am still hoping to find something of a similar standard. Somewhere. One day.
You will never find anything like it outside of California is what I hear. Even in Mexico or Texas the other two top possibilities. You can find great burritos in LA though, I've been told.