Thanks for helping me think this through.
If I were still working, the first pair would be work pants. Since I'm not actively working, I wear my "work pants" for luncheons/dinners, shopping, etc. I have plenty in this category, but I don't have a white pair. They are looser fitting than most of my current pants, so they'd do well with my shorter and more fitted tops.
The kick crops aren't as refined as the twill ankle pants, but for the most part, they could be used interchangeably when the other is in the wash.
The Gap pair is the same level of casualness as the current capris, so their "when to wear" would be similar. The BF look is a new one for me to play with. Like Suz, these were super inexpensive in the last no-exclusions sale.
Does any of that clarify anything?