Imo, Being happy has nothing to do with it. It's his volatility or temper that's more of a problem. In the last 2 big matches, vs ManC and ManU, he has attacked the ref. Yes, every Chelsea fan will have gleefully enjoyed that rant but do you really want to see the club captain having a go at the ref? It's the captain who speaks to the ref on behalf of the team. I would prefer a calm captain - Lampard for eg - in that Oscar-Giggs tussle, came right in between them to play peacemaker.