He's quite relaxed in his style, easily goes off at a tangent, but has lots to say! When he's 'thinking', he uses a different voice, sort of quieter, so know when I read his column, I can imagine him reading it!
He is quite nutty! There is a podcast of his reading, and others, but haven't looked at it myself yet.
http://www.theherald.co.uk/ayewrite/