I like reStructuredText, but the format is grating compared to markdown. The two things I do the most are sectioning and links. Inline links are ok in rst, but I prefer markdown. Sectioning though is awful. I hate having to hold the damn == or -- or ~~ down and getting the length right. It's easier to parse when you read the plaintext, but makes me loath writing it. Most the time I deal with md or rst, they end up formatted anyway, which is the point IMO.