Nepe - your additions are very interesting and i do see where you are getting it from. I have to say that makes a lot of sense!
also just adding to the different theorists, one other main theory is by Hatfield. She is basically saying that there are only two types of love ( passionate and companionate love) compared to sternberg's eight types. I feel like a lot of individuals experience these two kinds more than the other types and it has a lot to do with reciprocity in terms of self disclosure for companionate love and the concept of excitation transfer for passionate love. (excitation transfer is basically stating that people associate a certain type of physical arousal with someone or something in their situtiaon rather than what first caused the physical arousal to occur). These two types are very common for example among friend in terms of companionate love and infatuation for someone in terms of passionate love.
just adding to nepe's list of theories! :)