Could I ask a simple question, not because I want to mock people or anything, but because I've been experiencing a similar phenomenon lately. Why does facebook make you hate people you know? I do generally find that most people I'm not actively great friends with at the moment tend to annoy the shit out of me with either bragging, illogical nonsense about things like politics, or just passive-aggressive teenager post…
It's an interesting psychological phenomenon. I think on some level the narcissism that Facebook encourages (look at me, I was here! My new shoes! A car we rented in Vegas! Look how drunk we are! On a plane to Hawaii!) especially for those that are not our close friends (and there's various debate about what our cortex is designed to handle in terms of social group siZe, and we all exceed it on Facebook) triggers jea…
1. Pseudonyms (or first-names only) are allowed and widely used. So there's less expectation that your Twitter social life has to match your offline social life.
2. The asymmetric follow model. You can follow someone without them following you. You can unfollow someone and then change your mind and follow again without them even noticing.
Combined, the dynamic of Twitter is that you follow based on interest, whereas on Facebook you friend based on acquaintanceship. That produces a pressure to be interesting.
I'm not a particularly heavy user of either Twitter or Facebook, so please weigh in if anyone thinks I got this wrong. But this is why they feel different to me.