Well, the issue that cropped up with the coalition of the Tories and LibDems, was that the LibDems was able to use it's part of "if we don't agree, you don't have a government" to call a lot more of the shots than they should of. Which basically had the party that most people did not vote for.. had a leading edge of power.
The swings and roundabouts of coalition groups is that the small group that sways it, has influence far beyond what they would have if based on their actual voting public.
Still, it's kind of amusing that various European countries have sent congratulations along with comments like "We're happy to see Cameron win, and we like his 'One nation, One United Kingdom', we just wish he'd added 'One Europe' to that statement..."