I always get told I should join in more with group conversations, but a lot of the time there's nothing for me to say. I'm pre-programmed to think in terms of efficiency, and talking about nothing (as most people seem to do) feels like a waste of time. I also don't connect with a lot of the casual topics that people strike up with me; yesterday at work it was celebrity crushes, hen parties, babies, drinking, and guys . I would be up for meaningful conversations, but they're few and far between.