I'm going to OD on Valium now that someone doesn't like my Gatts, but isn't attacking ..other characters there that I know. :( My death will be their fault.

Let's see, UM.

1.) Being a dick to everyone.
(Check. Post-Eclipse behaviour;
re: telling theresia to cut herself and kill herself and meet her parents in hell;
re: telling jill similar things before finally being soft with her like, at the last minute
re: locking Caska up, dragging her around on a leash; etc.
re: ..every other thing ever. He only softened up toward right before the Eclipse, or has this person only watched the anime? that would explain a lot :( where Gatts' entire character is drastically changed)

2.) Threatening to blow up Paradisa/find a way out no matter what/not giving into fate
re: him every chance in canon he gets to shout how much he doesn't accept destiny and blah blah and go against all odds typical hero stuff

3.) Him killing a bunch of people
re: berserker armour

Other than that :( I kind of..really haven't done anything else with him? Except make him be semi-friendly but mistrusting of Griffith, and readily snapping on him as soon as he got all freaked out.