When you symbolize data on categories, sometimes you symbolize a few unique values and assign the rest to <all other values>. In the TOC, this entry is always listed first in the layer. Other values can be reordered with arrow keys on the layer properties symbology tab, but not this one. For me, <all other values> is usually a collection of less important features in the view. Usually, I would rather see it at the bottom of the list than the top. Or sometimes, I want to rename its label from <all other values> to something else and then I might want to insert the renamed value alphabetically into the list of values. Anyway, I would like this flexibility to be available.