Baz, you inspired me to go to this Mexican place in Harvard Square. They have great tamales, everything really. Line is always 30 feet long, forget about getting a seat, but sitting in the square is nice.
Fun eating night: tamale, slice of pepperoni from Otto's and a Tasty Burger. I sometimes like to go to 3-4 restaurants in one night for a little of this and a little of that.