I left my mothers house when I was 30. Even though it was her house, I always worked and paid the bills (gas, electricity, water, groceries etc). I think it kinda hits you and you feel when it's the right time for you to leave. I had several people mocking me for that and I was pretty fine, cause my trajectory in life doesn't have to be like theirs or anyone else.
I feel good now that I have my own place and my responsibilities. It was kinda hard in the beginning but ok at the same time. The feeling of FREEDOM was worth it. My mother had lots of rules: no guests, no parties, no alcohol etc, and I always respected all of them, cause it was HER place.