It is personal taste. I do not see anything enjoyable in Mama Mia. It might be because I am not an ABBA fan, or some other reason, but it (and most jukebox musicals) just are not my cup of tea. I believe theatre needs some type of creation, and the producers of MOST jukebox musicals avoid creation at every chance. They try to string extremely loose plots around music that has no connection whatsoever. It is the rare show like Jersey Boys (which I consider to be a play with music NOT a musical) that makes me see that jukebox musicals can be something more if there is creativity.
SOME (and that is a big SOME) Wildhorn stuff is very good (His revisions are, I believe, much better than the original product). He uses solid source material but also lets his and his collaborators' creativity affect his shows. Now, I am the first to admit that the Wildhorn shows that have appeared on Broadway have been crap, but, having worked on and directed Wildhorn shows myself I believe that they were crap because of choices the design team made, and that the shows do have the possibility to be great.
I am sorry if I have upset anyone, but I believe theatre, even at the most basic, needs to touch people in some way that no other medium can. Mama Mia did not do that to me and was the start to a menace that has been destroying the quality of Broadway (once again, this is all my opinion, and I am not forcing you to take it as fact).
David walked into the valley
With a stone clutched in his hand
He was only a boy
But he knew someone must take a stand
There will always be a valley
Always mountains one must scale
There will always be perilous waters
Which someone must sail
-Into the Fire
Scarlet Pimpernel
