After double checking with you in the Comments section to make sure that I am reflecting your thoughts accurately, this put-together answer should take care of your question:
"I had a lot fun with startups and my own business, I learned a lot and I got to see business situations from all angles. The only trouble with owning a business is that I don't own the business, the business owns me. Actually, my clients own me. If someone calls me on a Friday at 5PM and if he wants me to get it done for him on Monday at 9AM, I can't say no to him. Not unless I want to lose his business as a regular customer and not unless being homeless and hungry fulfills my sense of adventure. Again, it was fun, it was exciting but the wear and tear got to me"
"The nice thing about working for you is that you're handling a lot of the headaches that used to be mine as an owner. I get to focus on what's interesting and challenging while you handle everything else that used to keep me up at night, like making payroll and paying the bills"
"Don't get me wrong. It was fun. I had a great time. I would wake up in the morning not knowing what kind of doo-doo was waiting for me to step into, and it was exciting to manage on the fly these issues that popped whenever out of nowhere. But eventually, the excitement and the unpredictability were too much of a good thing. Even taking sick days was something I didn't dare do. I couldn't take vacations, I was chained to my business"
"You have no idea how much I love having a predictable schedule and having sanity back in my life. Working for you, I get the challenges, I get the excitement without the craziness that's part of the package of owning my own business :)"