It's always interesting to see qualitative stuff associated with quantified self; it seems like ultimately the goal is to lead a (happier|better) life, which is a very qualitative notion, but we end up turning as many things as possible into quantitative criteria and looking post hoc for some pattern.<p>Koby's tweet shows what a breakup looks like, and it's tragic, but if you imagined someone retrospectively posting a screenshot of their heart rate readings from the day they met their current partner, we might see a similar pattern of elevated readings as well, wouldn't we? It seems like it would be just as plausible (to me, anyway).<p>I'm not saying that we should find better dimensions to measure (I think we'll always find ambiguous, confusing results absent context), but that whatever we measure should get qualitative context if we want it to really mean anything.