Basically, people from all walks of life, which is one of Freemasonry's benefits: It allows you to meet people you wouldn't otherwise have met and get to know their perspectives and points of view.
That said, since its self-proclaimed purpose is to make good people better and a Mason should attempt to become better version of themselves, you'll most likely find people who seek purpose and self-improvement beyond shallow self-optimization (honing your skills is very much encouraged, too, though).
It all depends on the lodge! Many lodges are struggling to stay alive and are desperate for new members. It's not uncommon to find a lodge of mostly really old men where they lose more (to deaths) than they gain from new members.
