I agree that there should be more sophisticated villager interaction. They should stop and talk, hang out etc.
Teenagers should blow off their chores occasionally to hang out etc and some should even just talk on their cell-coconuts all day. (We could have teenegers talking into coconut halves connected by strings or something)
You guys have a lot of great ideas! In the end, it's always hard to narrow down all the fun ideas to the few that we can ultimately implement.