This may surprise you but many of us have no problem going through a checkout dive or two, regardless of our cert level and experience. I recently went on a tech diving liveaboard where most divers were extremely experienced (Technical CCR Instructors, Tech ITs, Tech Wreck divers from the East Coast, Cave Divers, etc.. etc..) and our first day dives were basically check-out and familiarity dives both on skills (more so for me as I had not dove with anyone on the trip before and I'm new to technical diving) and the wreck itself. Sure, part of me would have liked to jump right into the dive plan of my choosing but I understand and respect the reasoning why that wasn't prudent. Unfortunately, the rest of the trip was a wash due to seas so I never got to scooter around the entire deck of the Oriskany, or see all I wanted to see in the hanger deck, etc. Do I regret the first dive or two was a conservative "checkout" dives when it could have been something more? Absolutely not..