That having been said, it is a pretty powerful force. And sometimes we must choose between being parallel and some other good rule of rhetoric.
Two examples that vex me periodically:
- Tables where all of the cells in a column have multiple entries except one. I want to use bulleted lists to make the multiple entries more readable. Do you bullet the lone item in the one odd cell? I do.
- Grouping fields on a form where inevitably there is one field that accounts for an entire function and doesn't go with the others. Do you fence in the one lone field with a grouping box or leave it out there as a free range field? I fence it in.
Am I being overly zealous in my desire to have parallel treatments? Are there other examples that vex you? Chime in.