My 1st deep dive to 110 ft was my #10. It was a boat dive in Grand Cayman, with a ragtag group of maybe 12 tourists, ranging from teens to retirees. The visibility was perfect, the dive was easy and we did not have any second thoughts going deep. "If they can do it, we can do it!" We did 5 shore dives at (then) Turtle Farm before this so felt comfortable.
Good visibility and minimal currents make a huge difference!