He's a very funny bloke and has performed/written some of the greatest comedy sketches and series ever made. However, every time I see him interviewed, he comes across as hugely arrogant - might just be me but that's how it seems.
Saw a Python documentary and he seemed quite dismissive of everyone else apart from Chapman and even then it only came across as grudging respect.
Like I say though, it might just be the way he came across.