You mention some good points there Derek, I definitely enjoy being able to pick up a round mallet and not having to align it before striking (though a good handle design makes aligning it straight very natural and easy). I do turn to my joiner's mallet for heavy use, though that is probably because it is larger and heavier. Thinking about it, I realise that a round mallet the same size and weight as my largest joiner's mallet would be rather unwieldy.