Sounds like an echo in here, but it really DOES depend on what you want to do. The American Adventure is one of the best shows in any WDW park; it's a "must-do" for me. The show itself is 30 min, and if you allow for queuing time, you need to hold most of an hour for it. China, France, and Canada all have enjoyable films; they each run 10-15 min, and you might have that much time to wait for the next showing. Norway, of course, has Frozen Ever After which is either an FPP attraction or a long wait (although it's in WS, I kind of look at it more like a major FW attraction for planning purposes).
Other than these attractions, it's really all about eating, drinking, shopping, and looking around. If you're not eating or drinking, then shopping will be your biggest factor. Some countries' shops I just walk through , others I can spend 40 min in, and some I just walk past
Many countries have live entertainment (mini "street shows") on set schedules. You can either watch for a few minutes if you walk by while they're performing, or you plan your time to specifically see a show.
Wish I could be more specific, but it's just the nature of WS - and one of the reasons it's probably my favorite place in WDW - it's kind of take it as it comes, soak up a bit of atmosphere of where you are, and then move on