Well, you know we disagree on Nigel, Den.
But I would pick you up on your critique. You say that he "lacks the experience, the charisma, the believability, the marketability, the UK exposure and the credentials ".
Experience? Experience of what, exactly? The present incumbents have all rushed straight from university to leadership via party internships and there are few others in their parties that have had any experience of the outside world - actually many look and act as if they've gone straight from nursery to parliament with nothing in between. Nigel has, at least, run his own business in London and only later gave it up to go into politics.
The charisma? Why is "charisma" important? I'm afraid we see US presidents elected on the basis of charisma and look where it's got them. The best of intentions and actions to back them up are required, not X-factor charisma. Besides which, and this goes for your other doubts regarding believability, marketability and UK exposure, just read the comments below this piece in The Mail:
http://www.dailymail.co.uk/debate/article-2158835/Going-Viral-Nigel-Farage-slams-incompetent-Mariano-Rajoy-warns-Euro-Titanic-hit-iceberg.html?ito=feeds-newsxmlToday I watched the Politics Show and PMQs. I heard not one,
not one, MP answer a question with straight answer or sway from their party political script. It was refreshing to hear Farage tell it like it really is.
Really refreshing. OK, maybe he doesn't doff his cap in an obsequious way to the apparent top brass in the EU, but then, they don't deserve it - do they?
A man who has come through testicular cancer and an air crash, yet can still put on a display like this, deserves respect. And he is gaining it, rapidly.

P.S From the comments:
The politics of madness , no wonder you can see the anger in his face as he was speaking. That is a man speaking with passion , from the heart , not like the traitors in Westminster who speak from crib sheets whilst their hearts are firmly fixed on their bank balances and their future on the EU gravy train.Maybe that shows he does have charisma, after all.