He gave tons of interviews while trapped in the embassy, and I can't imagine the past few months in prison changed much of what he would say.

I like to watch this Juice Rap News episode from 2013 about the Australian election, by the end Julian appears from the Ecuadorian embassy and he does some singing (voice-over, but his expressions are priceless): https://youtu.be/QWU6tVxzO1I?t=209

It's very easy to forget the human behind the name in these cases.

Assange is very likely going away for life.

I don't share your pessimism. This is clearly a political extradition and it will be seen as such by the UK Supreme Court.