Tom and Jerry were a pretty inferior example of cartoonery by the Hanna Barbera outfit, which never never came close to the imagination, range of characters, and outright multi-level humor of Warner Brothers creations.

Each to thier own I suppose. Warner Brothers seemed to be best at coming up with characters I disliked intensly. Tweety Pie should have been eaten by Sylvester, Road Runner should have finished off splatted and Bugs Bunny should have had the life pummeled out of him.

I can't say H&B have never achieved the same effect, eg. Lambsy should have been served up with mint sauce but I really liked Tom & Jerry. With that they achieved something none of the Warner Brothers examples I'm thinking of managed - both "hero" and "villan" were likable.