If my memory serves me right creatine used to have a bad reputation due to causing bone issues
Nah. It was renal failure.
TBH I don't think there's much evidence it actually does anything to help build muscle; mind you the only bloke I know who was taking it forgot to do any actual training so it definitely didn't help his performance.
Also, it's banned in France if you're planning to do any racing there.
It definitely will not make you more angry it does not increase testosterone or the like so the chances are anyone with that symptom will be having "roid-rage" and just lying about there "other" supplements
Agreed. Whatever it is, it's not an androgen so anyone who says it gives them roid rage is being economical with the truth about what else they're taking (if they actually know - a friend is an endocrinologist, and has a clinic full of people with steroid-induced testicular failure who had been taking supplements 'prescribed' by trainers and neither knew what nor how much they were actually taking)