Is there a keyboard shortcut for upvote/downvote? I recently switched to upvoting because I reached my favorite limit but there's no easier method to perform an upvote.

https://e621.net/static/keyboard_shortcuts
doesn't appear there is currently

What would be best? Up/down arrow? I'm not sure if people would expect that to make the page scroll up and down or not though.

faucet said:
What would be best? Up/down arrow? I'm not sure if people would expect that to make the page scroll up and down or not though.

maybe shift < and shift >? or just , and .

faucet said:
What would be best? Up/down arrow? I'm not sure if people would expect that to make the page scroll up and down or not though.

I would also like this implemented. Any keyboard combination is fine. Verspersus suggests , and ..

This is something it would be nice if you had an extension that let you do this for all boorus...

faucet said:
What would be best? Up/down arrow? I'm not sure if people would expect that to make the page scroll up and down or not though.

Shift+up/down arrow, that's the way it is on a specific meme site

I mean, for me I have
W = Upvote
D = Downvote

W for Well Done
D for Dislike
that's what I was thinking.

Shortcuts should ideally be usable anywhere, including in a text field; If you agree, then in practice this requires a chord that doesn't produce a printable character (eg. Shift+Up).

It would also be nice to make a choice that is reasonable across multiple keyboard layouts (if you don't just make shortcuts configurable). Ctrl+[ | Ctrl+] or Ctrl+, | Ctrl+. would be good in that they satisfy that.

It wouldn't hurt to make downvote a little less convenient than upvote, though.