Well, he seems as if he'd be OK to have a drink with. And I like his singing (not 'like' as such - am entertained by!).
I don't mind the discursive answers so much, either, and recognise it's an order from the producers. I liked it when Judith explained her reasoning in Millionaire, for instance, but, yes, as Pantscat said, sometimes you just 'know' and then it must be hard to give a reason.