I think it would be very beneficial if there were notifications of replies or actions of any kind on threads where one has replied or started instead of having to check back, if they remember about it at all.
I'm sure some people, like myself, have poor memory or just rely on that sort of system to keep things in mind and I have yet to see such a thing in the forums.
Please consider. It's not a big change, imo, but would make things much much better and more efficient for active threaders.