Maradona was a drug addict, Best was a drunk, Giggs was the welsh version of Jamie Lannister, Keane was a bully, Baggio was a fragile creature who would go into depression simply because someone looked angry at him. These players would walk into any squad in the world. In my opinion, what really matter is his talent and what he does on the pitch. Hence why Id rather have someone with Giggs issues then with Best issues or Maradona issues (the latter two were way better players then Giggs).
Also many people think that Blanc is a gentleman. He's not. He turned us down 2-3 times and was quite vocal about it (he literally thrashed the EPL and United) up until SAF picked him from the rubbish can (ie Inter reserves) and gave him a career lifeline that he didn't deserve. He would never joined if he could still run.