To be honest, I didn't think much of the pilot, but I wanted to give it a chance because of the topic matter. With there still being such a negative stigma attached to mental illness sufferers, it's good to see relatable, realistic characters that are either displaying signs of a mental illness or be seen to be compassionate and understanding towards those going through the symptoms.
If I were to nitpick at it, I guess some of the writing seemed a bit lazy in parts, but I find the characters likable despite (or maybe because of?) their flaws. I find myself being easily drawn into the plot and I guess this helps me overlook what I see as failures in the story line where luck seems to have them in the right place at the right time saying just the right things... not as realistic as I'd like, but I guess I'm watching this more for the entertainment factor.
It also helps having actors who double as eye candy ;)