Peter those are all valid questions, and I'm sure I won't answer it correctly. For me I love the intense flavors, the crema, and the simplicity of such a small cup of coffee.
Have I had a good shot? Living in New York City and traveling the world, yes I believe I have. Having tasted the coffees of italy and France to blue bottle, intelligencia, grumpy and many others I have had good espresso.
However, as much as I'd like a cremina or a rocket PID, it's just not in the books. Not to mention NYC kitchen Realestate is quite valuable.