Disco Dogs is a good owner. In the league I run, he took over a team which was in shambles, and turned it around very quickly. When he left the league after a few seasons, he let me know well in advance, and left a good team for the next owner. He said that he was cutting back on his teams.
I would not hesitate to let him back in if he wanted to rejoin.
Ronblood went AWOL after the first season of the league. He missed many picks in the inaugural draft, and never submitted his keepers for the next season. He is also very hard to communicate with. He seemed enthusiastic about the league, but was unreliable.
The absolute worst person on this site is danka, whose motive seems to be trying to wreck leagues. In the league I run, he stuck the league ERA leader, Carlton, in AAA for roughly a week (real-time, so like 20ish games) as the 120-game mark approached, in an attempt to lose games to get a better pick. He also completely dismantled the team. Furthermore, he threw a shitfit when called out for tanking, and quit the league in a rage. He is well-known for behaving like that, and I'm surprised he's not the first name on your wall. I will never let him join a league I run again.