In my experience Zoloft did not change my personality, it just put a floor under the anxiety and depression. I still feel, happy, satisfied, sad, frustrated, nervous, angry or whatever depending on the circumstance, but the sadness doesn't become a bottomless pit of blackness any more and it doesn't explode into uncontrollable fear.
I am able to put into practice cognative strategies, like meditation and relaxation and maintain or recapture control.
It may or may not work for you in which case there are other medications to try, but it won't turn you into a zombie or a flaky Polly Anna either. It just takes the edge off so you can stay in better control.