I started regularly in 2015. I've gone back and watched a lot of old fights, but mostly of those still currently fighting. The only old GSP fights I've watched were his ones with Hendricks, Hughes, and Penn, (Btw, unbiased opinion, I had GSP squeaking 3 rounds against Hendricks). The other big three I keep hearing of are Fitch, Koscheck, and Shields, but I keep getting them mixed up with each other because they're all described as the same fighter. What made them unique from each other? Before I watch GSP's fights with them, if I had to watch one of their fights to best understand how their whole shtick, which would it be for each?