I think a great time saver would be a task-tainted and/or a task-nonfree that would help getting all those programs, codecs and plug ins that a lot of people like/need
I think that's a good idea in the end.
Something like Task-Multimedia. Obviously not installing everything under the sun from tainted, but the minimal packages needed to be able to watch a movie and listen music (local or radio streams).
Not everyone knows what needs to be installed in order to do that.
It would be also useful if for some reason you have un-installed some of those packages.