If you are good at being fake, HR is the place to be. It's the only way to have internal mobility. It's mind-boggling to me that the people in HR who have their favorites think those people genuinely like them. The moment they turn around those very same people have so many negative things to say. If you like drama, being in a popularity show, and are good at faking it, this is the place to be. It's like being in a reality show.
From what others have shared, depending on who you are supporting, get ready to be micromanaged. Sr.managers & SVP's walk around like they should be worshipped. Also, In meetings they say "we welcome your opinion" but the moment you share it or let alone challenge them, be prepared to be looked down upon. This is the main reason I left.
Pay! You can do as much or have even more responsibilities as another associate but the difference in your title will pay you less. For example, a coworker who is in an associate role gets paid about 10k less than someone who does the same role as her but since the other associate is an Admin II, the pay structure is different. Although, she does so much more and has to support 3+ people.
Run..if you care about your career, please invest your time elsewhere. They will run you to the ground.