Dream: a Tory - Lib Dem alliance. Clegg forces electoral reform on to the agenda and we get a referendum between the status quo and some moderate form of PR like the Alternative Vote system. Vince Cable becomes chancellor instead of that little pink feller Osborne. Tory radicalism on education is tempered with a concern for equality. The Libs' dafter ideas are sidelined.
Nightmare: a Lib-Lab alliance. Labour have austerity for two years, then resume pouring money into the public sector. It doesn't work, of course, and public cynicism extends to include the Lib Dems. We gradually become more like a normal European economy - slow-growing, sclerotic and riven by the populism of an embittered majority.*
In between these I would obviously prefer Tory to Labour.
Quite a tough choice therefore - go for strengthening Clegg's hand or play it safe and vote Tory?... Anyway, I voted by post so now it's up to you lot.
* [purple passage]