I don't like any of them. Markdown, ReST, various wiki/forum dialects of "simplified" text formatting. They are all as complicated if not more complicated than just writing HTML. They all have a bunch of rules and special cases. I'd rather just write in HTML which I already know. I don't understand the motivation for any of these "alternative" markup formats. Normal non-technical people want Word (or at least, some k…
Not all markdown text is written with the intention of being converted to HTML. Pandoc can convert markdown to .pdf (via LaTeX), .doc, a slide-deck (using either LaTeX-Beamer or one the HTML presentation tools) etc. Compared to LaTeX, markdown markup is less obtrusive: a single asterisk/double asterisk/double backtick interrupts the flow of text less than an \emph{} or \textbf{} or \textit{}. Since there's less noise…
Indeed, I use pandoc for making LaTeX beamer presentations and it generally provides the goodness of Markdown and LaTeX combined. Slides can be made far more quickly than in LaTeX. E.g.
# Some section slide
## Slide title
* Bullet point one
* Some math: $a^2 + b^2 = c^2$
At the same time, one can e.g. immediately insert fragments of TikZ using the relevant \begin{...} \end{...} block and it just works.