Matches as entities

Been thinking about implementing matches as entities, either as our own custom entity type or using relation or something similar.

We'd be able to do a history of matches (fill in with matches from last time if we only return 2 this time) we'd get views support. We could build features like Facebook and Meetup have (You know this person from here, you have 9 mutual friends, you are both members of x).

Data model: requesting user, matched user, match weight, type of match

Anything I'm missing?