Normal but then fame and riches turns most into jerks. Some probably stay grounded and normal but it seems to be rare.

I also think a somewhat large percentage of them are clinically insane and if not for being discovered and having been thrust into acting they would be on the streets and nobody would care about a single opinion they have.

Which is another reason why we should never care about actors opinions on anything. They make a living by pretending to be something they are not.