Twitter's prime flaw is that it is fundamentally narcissistic in a way that, say Facebook, isn't.

Of course you can be narcissistic on Facebook, but you can just add your friends and react on their shit, and occasionally post a photo of your weekend.

On Twitter, if you're not capital I interesting or flailing for attention, you'll just get ignored. Hence the other comments that Twitter isn't social at all.

Twitter is great if you like to sell yourself (and are at least mildly good at it). Otherwise it's a stymied feed reader for random thoughts.