Utter dislike of the Coalition of course. The Lib Dems may have greeted Nick Clegg triumphantly enough today, but the tenor of many questions to him yesterday was far from triumphal. Even today's set piece speech seemed, to the BBC's Nick Robinson, just a little defensive.
If you want a clear idea of just what problems beat against the coalition from the Lib Dem left and the Tory right, have a read of the following two articles. Evan Harris in the Guardian explains why the Lib Dems need to distance themselves from policies which they feel have been imposed on them by the Tory part of the coalition. Tim Montgomerie on Conservative Home bemoans the fact that the Lib Dem part of the coalition has become too powerful, and identifies three more policy changes which concern Tory right-wingers.
The leadership of the two parties may be pretty well in synch, and former Tory turned Lib Dem Baroness Nicholson might exult that we now have a properly One Nation government, but this is a Janus faced coalition, and it will keep wondering exactly which face to put before the British public throughout its career.