I agree, hearing repeated jokes and patter is the worst thing, and there's no excuse for that in the same festival.

But I also expect to hear a substantially different musical programme each time if an artist is on more than once. I feel a bit let down if there's much repetition, unless it's of a popular favourite that the audience expect ot be in almost every set. I'm sure many artists are capable of devising several contrasting sets, possibly with different themes or emphases.

Marje