In all honesty he got all Billy big nuts about the Manure position but, and it's just my take on it, Ferguson (Alex) and Utd didn't adequately plan a succession policy, so a very, or what seemed on the outside looking in, quick decision to go by Sir Alex left them in a bit of a strange position, of course Moyes didn't help by clearing out an established backroom.
Sociedad I can't comment on other than his poor attempt at Spanish!
Sunderland were and still are a mess.
His achievements at Everton, taking off the bitterness over his behaviour on leaving, were stable, settled, rather pragmatic but nonetheless relatively good but in the end not quite up to it in as far as bringing silverware.
You can't deny his time here was OK overall and his 2nd spell at the hammers is at the moment better than that.
Again, I'm not saying get him back or that he would even consider it.