I didn't look at all of the tattooers and all of their tattoos, but overall I wasn't that impressed. Lots of one dimensional, flat work. Also, I wouldn't get hung up on how long someone has been tattooing. The guy that did my wife's tattoo had only been tattooing for 3 years and he absolutely killed it. 10 years later, it still looks fresh.
I'd seriously suggest watching Ink Masters. Skip to the end of each show where they do the critiques and you'll miss all the silly made up drama. The judges critique each tattoo and tell what's good and bad about it. There are plenty of shitty tattooers on that show and a lot of them have been tattooing for a long time. It's just a place to start. I'd go to tattoo conventions where you'll see everything from absolute crap to outstanding work. Look at Tattoo magazines. Educate yourself before you get more tattoos.