I don't get him at all.
Seems like a nice enough bloke and I feel sorry for him, but I really don't get how his act is that popular; it's like people have never seen a saxophone player before, he plays tunes simply and rather dully imo. It reminds me of music I've heard piped in supermarkets where a sax is the the lead (which is a bad idea in itself to me, I've always found sax doing pop songs tedious).
If it had been a singer following those melodies, Simon would have said it was karaoke and dull; there wasn't any soul there or anything that made me think it wasn't sheet music. Luckily he picked songs that easily push people's buttons.