I'm with you on Moist. As for Unseen Academicals - yes, I think that was one of the ones where Alzheimers was really getting its teeth into him. Raising Steam is similar.

There's a point where you get a lot of rather similar monologues from his characters. I presume these are from the period after he had to dictate as he couldn't write directly any more. If so it's amazing that they're as good as they are.

What an embuggerance (as he said himself).