Then, there's always time and luck.
Time
I disliked a guy named Taz who was part of the GUE-F and Tech 1 classes I had taken. But, he was the only one in the group willing to practice skills regularly. He and I started training together and became the best of friends. We decided to take TDI Advanced Nitrox/Deco Procedures with an instructor at Corey Mearns' dive shop in Conshohocken, PA named Ed Herbst. Before moving to Florida and working for Salvo then starting Light Monkey, Corey owned a dive shop and employed me to teach freediving courses. Ed was the only tech instructor there at the time.
Time
After we started class, we weren't getting along with Ed. But, we didn't quit. I've had students quit class. It's a shame because sometimes after a rough couple of days some magic happens and you find yourselves gelling. He taught us to dive well not just look good diving. Ed and I became dive buddies and great friends. When he retired from teaching he sold me all his diving gear and teaching materials, books, toys, maps, etc., for pennies.
Luck
I bumped into Ed Herbst again one day while I was freediving at Dutch Springs. He was teaching this incredibly beautiful woman (I mean ridiculously unapproachably gorgeous woman) a PADI AOW course. He asked me to freedive down to the car at 95 feet as a stunt so she could see it during her deep dive. The next day, I was training with my wreck and cave diving buddies. We were using scooters. She saw me backward kicking, filming video with a Sony camera in a Light & Motion housing mounted to the scooter, and eating apple sauce from a food tube. Yeah. That was back in the day when we thought we were so cool!
Anyway, she decided she HAD to dive with me. We did and fell in love.
Luck
Taz and I also decided to take a cave class. Not knowing anything other than GI3 learned to cave dive at Vortex, we called Vortex Springs and they set us up with Chris Wright as our NACD cave instructor. Chris was exactly what we needed to earn our respect, our trust, and give us the Ying to our DIR Yang. Chris is forever in my heart as my favorite diving instructor of all time. It's a pity he's no longer teaching. I later did the SDI Solo class with Chris in caves. I credit him for instilling in me the skills and mindset that has kept me alive when doing solo tech, wreck, and cave dives all these years.