WordPress Profile Picture Without Gravatar (And How to Add It to Posts)

As much as I love using WordPress, there are certain quirks about it that annoy me. One of those in particular is that the only default way to change your user profile photo is by linking it to a Gravatar profile. It’s not only annoying because it forces you to create an account with a service that you probably wouldn’t use otherwise, but then it also populates that same photo on any WordPress site you log into (if you use the same email address).