Would be neat if you could add nicknames to your players when they've been in your team for a while. Like Erwin "Magic" Johnson... Of course this should not come easy. E.g. only players that have been in the team for X amount of seasons or played a given amount of games (100 competition games) would earn this honour. The nickname could be sticky and stay with a player even after a trade, but the buyer could opt to remove it.