I don't believe that small talk must be exclusively negative just because you don't care about the answers. I don't think anyone can honestly claim that people ask things like "crazy weather we're having, huh?" because they genuinely want to know if you agree about the weather. They just like talking. They like hearing themselves and others make noise. Nothing wrong with that, but I think it's telling when the people I know who enjoy small talk rarely remember the things I said last time we engaged in small talk - they don't care about the answers, so they don't remember them. Again, nothing wrong with just enjoying passing the time with meaningless chatter, but I certainly believe that it is indeed the meaninglessness that defines whether it's small talk or not.