I like different parts of each one of them. I tend to go back and forth sometimes. I even use stock and Google Voice in the rotation when I get truly bored with my routines.....
i had handcent and loved it, then tried chomp and the way the settings was setup was way better. then i noticed the widget was very cool and i like the big "new compose" button on the main screen. but then i redownloaded handcent and it had all the same stuff...looks just like chomp. so i went back to handcent...