Honestly, I regret or wouldn't change anything. I've accomplished every single goal I wanted to do in my life and am still setting and reaching goals. I fucking hate stagnation.
Remember that for first 15 years of my training life, I trained with one top set (PR set) and did loads of sprints, jumps, runs, etc. I ended up with a 725 squat and 405 bench press, 39 inch vertical, 5:30 mile at around 225.
Rep PR's build strength of body and soul. Always have.