I've only found Rainbow Falls and Simple Ways to be straight-up disappointing. Every other episode has ranged from decent/harmless to amaze-balls, so I'm good.
You generally make it fairly clear when you've been let down by a new episode. Unless I've been completely misreading your generally unenthused status updates as of late. :\
But they didn't do so entirely. Probably I'm too confused being a disillusioned idealist to actually be able to tell whether I'm an optimist or a pessimist. Then agian, I maybe unconciously want to be disappointed, hence my expectations. :/