I'm using twitter still, to promote my sites when I remember so, and to pick up some links when I'm out. But I don't think I'll ever love it.
It makes me stressed and jittery. Like running around at a party and trying to follow 30 conversations at once... what if somebody says something interesting while I'm not there!!... OMG, must move on, must move on, must move on... With the result that I never have the time to process anything and actually get the benefit from it.