Well I just finished United States of Tara. I have a few complaints but all in all I enjoyed it and the finale tied everything without leaving everything perfect.
Possible spoilers below.
My biggest complaint with the whole series was the daughter, Kate. Why the hell did no one care about her age? She slept with her 20-something boss when she was 15, graduated high school when she was 16, and somehow became 19 for the third and final season and had a 30-something boyfriend who had a kid. It's like the writers regretted starting her off so young.