I initially put a phantom skinz on my last phone (an incredible), but took it off because I hated the way it made the screen feel. Also used the Seidio Innocase II for a while, but took it off because dust would rapidly collect on the screen at the edges of the case. Other than that, it was a decent case.
Eventually, I just carried the phone around completely unprotected. In 9 months of daily use with no protection, I never got a single scratch on the glass.
wow how hard is it to apply a screen protector? im on my third one from IS (after warrantying the first 2 because it saved my phone screen from some serious cat-on-phone violence) and there are ZERO bubbles and ive never even had a corner peel slightly.