1) My manager was more or less evil. I was promised a promotion and raise repeatedly for almost a year. She would call me into her office to tell me that I was going to be promoted, whose job I was going to get, the date on which all this was going to happen, and what my pay was going to be increased to. Then that date would come and go. Rinse repeat. She would tell me that I was ineligible for a promotion one day then tell me I was getting a raise the next. She intentionally took advantage of my people-pleasing personality to berate me about the tiniest of mistakes. Upon my giving notice, she tried to pin the high turnover of our staff on me. Borderline emotional abuse.
2) INSANE turnover. Some positions saw 3-4 people come and go within a year.
3) Catty, cliquish culture. I had no idea that adults were capable of being as vindictive and horrible as the people I worked with proved themselves to be. One of my managers would gossip about me to my coworkers while I was in the office and could hear him, for example.
4) Don't trust anyone who says it's easy to move up. I took the job originally based on being told by multiple people that I could work my way up. Instead, people were hired from outside the company to fill open positions even though myself and other people on our staff were getting awards and bonuses for going above and beyond.
5) Sexism was rampant. I was once told that I was too sensitive and was making my coworkers uncomfortable because I cried at work - once after a family member died unexpectedly and once when a coworker shouted at me in front of an office full of people. I was told that I wasn't allowed to cry at work again and that if I did, I would be written up. Meanwhile the men in our office would routinely be horrible to residents along with the women on our leasing team and were never reprimanded.
...I could go on. I was consistently amazed that given the size of Greystar so many borderline illegal things took place in our office. I'm sure that not all communities are anything like what I experienced, but be VERY careful and if you start to see signs of trouble, ask for a transfer immediately! I waited too late and even though I had never once been written up or formally reprimanded for anything, I was told that I was ineligible for a transfer because my boss didn't want to have to find someone else to do my job (she literally said "I'm not ready for you to leave" while I was asking for a reference for another property).