I think Thread Prefixes sounds helpful, and I bet User Picture Gallieries would be used a lot, but I don't know how many resources that would take, and Member Customization of Profile Page sounds fun too. :)
I think it makes sense, but at the same time, young adults who are out on their own for the first time do need a little extra help (not that I'm speaking from experience...), and 'practical', helpful gifts may cost a little more.