I like Katz's - but its very twee and caters more for the tourists now. I got a nice table and was left alone, but other friends were given short shrift and told to hurry up as the restaurant was busy!
Can't beat their pastrami sandwiches with pickles though!
Toms at 112th and Broadway is great but mobbed. Soup Kitchen is good with various locations.
Burger Heaven is a good outlet for burgers - I like the one near to the MoMo. about 7 years ago