One good thing about planning writing in greater detail is that it lets me see that something isn't going to turn out that well before I've put in months of work on it. My attempts to rework the novel idea that I'd just started have shown me that it's fairly unsalvageable. The trouble is, I'm now left in a bit of a gap while I try and think up something better. Still, I'm sure something will come along.
Whether it will be serious or not I don't know. A lot of what I'm reading at the moment is from the darker end of the fantasy spectrum (and woe betide that I should ever write prose outside it) but I'm beginning to suspect that I'm at my best when attempting to make fun of the universe. Still, the surprise should be interesting.