I read in another thread that, sometimes, it depends on the days' agenda. We found that some people are more attraction oriented and/or time constrained and don't like to use up time at a sit-down. While some enjoy the food, ambience, a/c, and a break from the crowds, and have the time to spend, ha ha. I noticed in that conversation, what appears to me personally as a trend; those who have done Disney more (and possibly more often), will do table service, while those who go more rarely, like to try to fit more attractions in and do quick service. That has been my observation, and in no way is fact or how it is for everyone. I am sure there are a bazillion other factors when families determine TS or QS but thought I would mention some observations from other threads.
Basically, there is no one way to do meals at Disney. It's each families' individual preference. Growing up in a larger family, we would often snack throughout the day, everyone had their personal favorite attraction to see and there just wasn't a whole lot of time for meals, or money for that matter. Now that it is just DH and self, we enjoy the meals most and my husband is the complete opposite of a foodie.