Unless I am really upset, I am always keen to have conversations. Hangover from the conversation practice I used to do from therapy, I always get a buzz from it, and people talking to me means I don't have to go through the whole initiation process (which is where the anxiety / rumination and possible avoidance and guilt stuff kicks in). If someone starts a convo with me, then it's all a bonus and I get a little buzz from it usually.
Unfortunately I intimidate the **** out of people, so they don't start conversations with me. And if taken by susprise I think I give off non friendly vibes.