#2 Scott Steiner (didn't regret joining WCW)
Scott Steiner worked for a string of promotions in his decades-long pro-wrestling career. He is mostly remembered for his stint with WCW, as well as WWE. Steiner didn't do much of note during his WWE run, and was a mid-card act as best, but it all changed when he made the jump to WCW in the '90s. He dubs his stint in WCW as his favorite times in pro-wrestling. Steiner stated that winning the World title and the Tag Team titles in WCW was a memorable moment for him.
I think the moment sticks out when you win the World Title and World Tag Team Titles. Things like that. The nWo was the greatest time in professional wrestling because we were going into mixed stadiums like the Georgia Dome. That was one of the greatest times in pro wrestling and was the most profitable time in pro wrestling.
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It doesn't seem like Scott Steiner has any regrets from his time in WCW. He won the World title during the final few months of WCW, shortly before Vince McMahon bought off the company. Steiner lost the belt to Booker T on the final episode of Nitro. A couple of years later, he made his way in WWE and had a pretty forgettable run.