Placing a weight on recent content seems like a great idea. It more accurately predicts what a follower will see. Also, wtf, I'm interested in music, bikes, and gun culture? I think I submitted one link about guns once, haha. Maybe I'm wrong? :) Edit: That last sentence made me think. Maybe "Things I'm interested in" which has the function of telling new users what content they can expect to see pushed to their feed from me should also include the tags of posts I share when performing the equation. That is really what I'm interested in along with my own submissions. Especially for someone like me, who is more of a talker and 'sharer' (what a clumsy word) than a link submitter...just reading my submitted links could really skew and/or not represent what you're getting if you follow me.