I haven't been on a cruise since my first cruise on the Wonder - a 4 day - in March of 2001. Here's a link to a website that has Navigators (daily schedules) for both the Eastern and Western itineraries:
http://www.dcltribute.com/navigators/. This will tell you what shows are on what nights. As far as the quality goes, everyone seems to rave about the Golden Mickeys (a theatrical version of the Oscars) and Disney Dreams (a Disney classic). New shows are Twice Charmed, and they have some other shows.
HTH.
