I like that Owen Hart was able to help prevent Chris Benoit's...actions in 2007 ITTL.
Owen Hart is one of the few wrestlers that no one has a bad thing to say about at all (watch clips of the Raw is Owen tribute show--Jeff Jarrett is breaking down (1), while Mark Henry burst into tears while reading a poem dedicated to Owen)...
IMO, while concussions did play a large role, that wasn't the only thing that caused him to snap--it was a combination of drug abuse, the stress of losing friends (he had 20 friends, including Eddie (whose death apparently pushed Benoit over the breaking point) and Owen, die young), and, of course, the aforementioned physical trauma (including concussions)...
(1) In an interesting sidenote, Owen was supposed to be in a love triangle with Jeff and Debra (their manager when Owen and Jeff were a tag team; she was married to Stone Cold Steve Austin for a while IRL), but he turned it down because he didn't want his wife to think that he was cheating on her with Debra--that shows how much Owen loved his family, IMO...