Polly Toynbee has (as usual) beaten me to writing about the virtues of Chris Huhne.
"Huhne is the most knowledgeable of the three - an economist, ex-Guardian economics editor, founder of his own economic consultancy - and he was a well-respected MEP. If he can think fast and deliver one-liners, his economic nous would keep him alive on his feet against Big Brown. A Lib Dem leader with economic gravitas could make Cameron's public relations professionalism look like a thinning asset in the years ahead. Huhne came out first with the sharpest array of policies for redistribution of taxes from rich to poor - though no overall tax rise. Biting Labour's ankles with tough green tax proposals is high risk but exactly what a third party should do when no others are serious about climate change."
Her descriptions of Ming and Hughes are equally apt.
Of Ming she says;
"he looks and sounds like a caretaker. Why would any insurgent party choose to tread water until after the next election?"
And of Hughes;
"both Labour and Tory apparats hope the weakest man wins. They are hoping for Hughes, whom they characterise as a bit chaotic, a bit too pious - and he scored lower in public opinion than his own party's ratings as a London mayoral candidate."
The choice seems pretty clear to me, but I'm not a member of the Lib Dems, and god knows what they think on policy. I'm not sure they know themselves!