I installed mine in /usr/local/brew because I already had a ton of stuff in /usr/local managed with GNU stow before brew even existed. I don't have any problems

I installed mine in /usr/local/brew because I already had a ton of stuff in /usr/local managed with GNU stow before brew even existed. I don't have any problems with it. Someone I know puts it in ~/brew and that works just fine, too. His reasoning is that /usr/local/ is for all users, and though he's really the only user on his laptop, it's just wrong to install a bunch of stuff that's just for him into a global user directory.