Biggest problem with him is how he treated the Man City QPR game that got him the suspension and ultimately shipped out for last season. QPR needed a result in that match. As Captain and one of the senior players he gets sent off, kicks someone and if i remember correctly he tried to stick the head in on Kompany. QPR only stayed up by pure luck of other results that season.
Whatever else about him, that really says he is not someone who can be relied upon, and someone who is trouble for the club.
As a footballer i always thought he had a lot of talent, but if he cannot be relied on in the most important game of the season for your club, I have utterly no interest in him being here