One of the most interesting benefits is to see people discover that limits can be moved. I guess it is the modern lifestyle, but we often put a lot of artificial limitations on ourselves. They can be both physical and mental, and BJJ is there to guide you past a lot of them.
Once you start grappling, you discover that your body is capable of doing much more than you thought it was. You’ve just never used it to its fullest potential until now.
What’s more important though, in an era of mental health issues is re-discovering the ability to remove certain mental limitations you might have placed on yourself. This is one of the things that is particularly true for me and I can freely claim that BJJ has transformed my life.
In short, you will start expecting (and getting) a lot more from yourself.