I'm like that until I have a few drinks, then I become a lot more open and chatty. I find I kind of need to drink (alcohol) around people I don't know very well or I pretty much don't talk. I'll give short (but not unfriendly) answers to questions. Not that I care about it much, I don't like to drink a lot these days. I don't mind not talking, I'm mostly happy to listen and learn about other people. I always feel like I know people better than they know me.
Oh and I found our bins down the street this morning