Brutus: Good of Rome or Good of Julius Caesar

Personally as Brutus I would choose the good of Rome because that is my first duty before being a good friend. One main story of the evidence that I have is Cassius was telling bad stories about Caesar like when he wanted to jump into the river and he almost drowned, that was bad judgment on his part. If he really wanted to be the leader he should have thought about what my choices are before doing what he did.