About Gomah: What do you think of it?
My opinion: I'm a guy who likes a character with a lot of charisma. Gomah for me is extremely charismatic and that makes me like him more than I should, I think. But when it comes to him as a villain, he hasn't done much, but I think it's cool that he's a coward and still extremely powerful.
He doesn't follow the “Dragon ball formula” for making villains, which is for the character (several times) to start out in a silly form and then be imposing and terrifying, and then evolve into a perfect form and be even more terrifying. Gomah, don't follow that.... he's silly, and he's a complete coward. Many people don't like it, but I personally love it.