What to do with Twitter?

I've been somewhat neglecting Twitter recently and mostly using it to broadcast things I am doing elsewhere. I don't seem to have the inclination to nail things in 140 characters that I used to. I feel guilty even retweeting other stuff as it doesn't seem to add enough value.

I began to invest less in Twitter because it felt as if there was less energy there (I believe that this was the cause of my lowered investment in it rather than the result of it). I have more fun and better conversations in Facebook these days so that is where I put my focus. Twitter is becoming a bit like Google+, somewhere I go because I feel I should rather than because I want to.

Are others seeing the same thing or is it just one of those phases that we all go through?