The Republik of Mancunia forum runs an Xpert XI competition where members take charge of teams with fictional players. You create the team name, choose the kit and pick the team. Each other players have certain strengths and weaknesses, in terms of their ability and personality. You can buy and sell on the transfer market, with the goal of winning the league or the Busby Babes and RoM Cups.
There are places for new managers for the coming season, which starts in a couple of weeks, so if you fancy it, sign up at the forum and check this out.