0 as an alternative would be cool, but I don't want special treatment. That said, we should try to find out how keyboard-mode players prefer to play. If most people are like me and rest the left hand around wasd/tab and the right hand on the numpad, then it would be good to optimise default keybindings so that minimal hand movement is necessary.
Now that I think about it some more, I'd probably move my right hand to hit some letters for equipping the item, and so / would work fine.
I don't mind adding duplicate bindings where they help and make some sense, e.g. in this case having a swap key accessible on the Numpad. However, on second thought it would make even
more sense to use Numpad '/' instead of '0' (so, both basically the same key). Another reason for having a secondary numpad key for the same action is to help non-US layout keyboard users who may not be able to easily access certain characters.
When thinking of the '/' I did figure it's a good candidate being close to alphanumerics, though.
About the "how keyboard-mode players prefer to play" I can say there will be no pleasing everyone because there are a number of hardcore players using vi-keys. This is one reason numpad keys are best left as only secondary options, because some players' hands never even travel way over there.
Unrelated question: does tab do anything right now? Outside of switching between targets in fire/examine mode? Maybe if it were a shortcut to volley/hit nearest enemy...
You mean go straight into targeting mode and fire? Seems kind of excessive, since you can just tap 'f' twice for the same effect, and more importantly dangerous, since you might overlook one closer enemy while looking at another. Then there is also the question of handling equidistant targets, whether unarmed robots count, etc. This could always copy the behavior of your standard firing preferences, but I find even that doesn't always turn out exactly as you intended, so it's nice to first check the line of fire and make sure, even if it's just for 100ms while you glance at the line and make sure everything's okay, like no obstructions.
I think we can save that key for something else later. (But yeah, right now it's just for switching between objects.)