I always feel like my stories lack depth as I write them. I'm not sure if I'm correct on my suspicion, or if I'm just being self-conscious, but whenever I finish a short story it feels like the plot and characters are superficial and contrived. For plot, I try to add nuggets of exposition, and for characters dialog and reactions to conflicts, but I'm not sure if these are effective in achieving a good level of depth. I guess that's based on the ability of the writer, but I'm wondering what the general consensus is about depth in writing a story. Is it through the techniques I stated? Or is there an undefined art to it?