I was on Zoloft for about 3 years. It takes about 2 weeks to kick in for most people. When it did I suddenly could think straight and get most of the work done that I had procrastinated on for so long. It was like a psychic painkiller. It didn't feel bad to be me anymore. It did feel a bit numb and quiet, though not in an unpleasant way at all.
The good things it did were to allow me to do things for myself I had denied myself for so long. I felt worthy of them all of the sudden. This led to some serious changes. I can basically trace the end of my first marriage to the changes that came out of my Zoloft experience, though I don't regret anything.
The change that allowed me to go cold-turkey on the Zoloft was that I finally allowed myself to ride motorcycles, which had been a life-long dream. Three weeks after buying my first bike I quit the antidepressants and never looked back.
Oh, and be ready for it to affect your sex life. I found that suddenly I couldn't orgasm. Thing was, I really didn't care. Your results will vary depending on your personal chemistry and which drug they put you on, but this seems to be a very common side-effect.