In my experience, dream characters are often "working against me" whether I am lucid or not. It is not every DC, but even people who are otherwise friendly towards me IRL can act as enimies in (mostly) non-lucid dreams.

For me, I would have to say that most of my dreams include some sort of problem that I am faced with. Sometimes these problems could come in the form of simple social interactions, or elaborate movie-like scenarios. Much less often do I get to enjoy a truely sublime dream, but I think part of the nature of dreaming is to sometimes set yourself up against certain odds.