Ironically, apart from a radical socialist spell in my youth, I am conservative by nature, but can't vote for them because of their nastiness, voted centre-party Green in the last two elections, couldn't stand the smarminess of 'Tory-boy' used car salesman veneer of Tony Bliar, although was delighted when Thatcher and co were kicked into touch.
I don't think Corbyn is 'old school' Trot. He's a parliamentarian. Being anti-nuclear weapon and pro-workers rights doesn't make him an ultra-leftie', although compared to May or Trump, he would be. IMV it is May and Trump who are extreme.