I'm looking to adopt a dog... but many tell me bitches have far better temperament.
Bastards are usually always neutered right? I hear they're batshit crazy if they're not because of hormones. Is that true? Sounds inhumane to alter the personality.
What do you think?
First of all,
bastard does not mean what you think it does. It is not the male dog equivalent of
bitch.
Secondly, male dogs are not "batshit crazy" if not neutered.
Thirdly, it is not particularly inhumane to neuter or spay a dog. In many ways, in fact, quite the opposite, as, for instance, unspayed female dogs are prone to more medical complications as they get older.
Which leads me to:
... neutering/spaying does not affect the dog's personality.
Not true for males. If neutered before maturity, most males will be FAR less aggressive towards other adult male dogs due to the lack of that hormone fueled sexual aggression/contention/dominance factor.
So, yes, neutering can and does fundamentally affect a male dog's behavior, and thus does affect his "personality."
However, this below is generally quite true:
...gender doesn't really determine temperament. Temperament is more breed specific.