OK, so what I came with over weekend is sort of "emotional / life" category - essentials, comfort needs, likes, rewards, wants/goals. Of course not every task is formatted, only those where triggering this emotional correlate is important for for execution and where this execution needs this sort of help.
Too bad it's not possible to non-destructively multiple edit formatting of multiple tasks - i.e. I use highlight and / or font color for the above, it could be useful if I could also add font style (bold, underline) to this via multi-edit without clearing the existing formattting.