I would like to support Jeremy: he has a lot of good things going for him, but he has three enormous, and probably insurmountable problems.
First, his views on foreign policy and defence: you can be a staunch socialist (if not a particularly successful one) without being wobbly on such things, as President Hollande has shown. Corbyn seems to be part of the Left tradition, of which I am deeply ashamed which seems to have his head in the clouds when it comes to the wickedness we face worldwide. And the ability to attach himself to causes that "sound" good but which are phoney.
Second, he doesn't have the support of many, probably most, of his PLP: he never showed any loyalty to a string of Labour leaders, and I am damn sure the compliment will be returned with interest when the times comes.
Third, of course, the right wing press.
Let's face it the Labour election was hijacked by people who should never have been allowed to vote. In one way, it was great: democracy in action and all that, but while policy "change" might have appealed to a lot of political activists who paid their £3 to vote for him (and in fairness a large number of others too) all the signs are that they are the sort of changes that not will appeal to the people that matter: voters who don't care much about politics and fear change in an uncertain world.
I guess that is a 4th problem then :-)