Each show has it's respective qualities:
Six Feet Under strikes me as more profound than any of the other shows. There are a lot of excellent subtlties in the show...
Sopranos is just a great show; however, not profound like Six Feet Under.
Curb Your Enthusiasm is often hilarious. I enjoy that type of comedy...
Mind of the Married Man is great too, although I'm not married.
Band of Brothers was excellent; I watched every episode. I hope they do another series like this...
The only show I don't really enjoy that much is Arliss, simply because the comedy is too "slapstick" at times.
HBO is the most prolific network on the planet, that's for sure.