I know that there is a lot of hate for GMK because Ghidora is smaller than Godzilla and is a good guy in the film. Those seem like silly reasons to hate, but it's there. I find more haters than anything, even though I love that film.
, I think that you'd enjoy the Millenium Series' take on Mecha-Godzilla very much. This one is built over the charred skeleton of the original Godzilla.