[Edootjuh]

This might be obvious, but PDF isn't usually reflowable (and if it is, it's not very easy to do so), which makes for a painful reading experience on a smallish widescreen monitor, and isn't editable easily.

I usually just decide between plain-text, HTML, Google Docs and LaTeX/PDF, going up the ladder as the complexity of the document requires, or if it needs to be editable.

I hate it when I'm e-mailed a Word document that could easily have been plain text, in which case it would be searchable and more easily found when looking through e-mails manually.