Same view, but 180'd? / reverse of usual axes direction in viewport via hotkeys?

Support Basics & Interface
1

Viewport hotkeys:
Numpad 7 gives you top view, ctrl-np7 gives you bottom.
Is there a way to get to those views but with the Y-axis reversed?

2

In a single key, no. You can use numpad 4 and 6 to roll the view around, though it’ll always reset after a view switch.

3

Someone on FB reminded me of the existence of STORED VIEW, so huzzah.

I enabled it in Texture Paint view, and Blender vanished/crashed. Noice!
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Ten minutes later, crashed again. I don’t think Blender/Texture Paint like “Stored Views” very much.