Not a big fan of him personally, but prefer his policy over that of the moderates.
Leadership wise, had worse, had better.
Potential to win an election? Dunno. Rallying is his biggest strength, not sure if that's the reason for coming back from miles away to a hung parliament though.
Feel that if the polls can be kept close he could have a big lead by the time the election comes.
He's not great but I wish we had someone better on the left, and I'm not sure we have.
Overall, he's OK.
I think there were 2 main factors that drove the improvement in Labour's fortunes over the last campaign, I think the manifesto was popular amongst a reasonably hefty group, and why wouldn't it be, most of us are pretty selfish and if you offer people a lot of spending that somebody else is going to pay for, it will generally go down well, probably difficult to manage quite the same impact second time around as I think those expectations for the Labour manifesto will already be there this time, and there will be diminishing returns with a more radical manifesto.
Secondly I think the Tories just ran an unbelievably awful campaign, and Theresa May embarrassed herself on the campaign trail, perhaps understandably as she seems incapable of talking to members of the public, no idea how that will play out next time, as we have no idea who will be leading the Tories next time out.
I do think the campaign went reasonably well last time out for Labour though and Corbyn is certainly an energetic and passionate campaigner as long as he gives a shit about the outcome (compare and contrast his performances during the Brexit referendum and the GE).
I still feel the old rule of thumb is probably pretty accurate if the opposition is to have a big chance of winning in the next GE it probably needs to be running big polling leads in the middle of the parliament, it hasn't happened for Labour so far but we will see what happens post-Brexit
Otherwise Labour's best chance of power is probably looking at getting support from the SNP in return for some cash for Scotland and a second independence vote.