Snapchat does this. It keeps track of how often you snap people and how often they snap you, but it also maintains a time metric of some sort. So when I open my snapchat, it shows me the 3 people I snap the most frequently at the top - but if for instance I haven't snapped one of them in the past week, even if I've snapped them 7 times a day for the month before that, that person will fall out of my top 3. Then there is also a list of "recent snapchats" where it keeps about 5 people who I have sent snapchats to recently. This is a lot more dynamic than my "top 3" list.

I don't think we could do it in list format here but I would really enjoy that. It could be like bars, like when you are listening to music and the bars go up.

I like this idea but I don't know as it is necessary. I agree wtih you about the building a connection - as I'll put it - the "old fashioned" way. Where you had to learn people's names and identities and personalities over a series of conversation, and yeah sometimes you forget stuff because it's human nature, but then it comes back up again and you remember or re-learn it.