No, you get to set that. The defaults are global. But you can override that (both globally and per community) only for you. If you never like jokes except in joke communities you can set “Funny” to -1 globally and to +1 in Ten Forward. But that doesn’t affect how it works for me.
This would, of course, man that posts are sorted completely differently for us. A really funny post might be extremely highly upvoted for me but in the deep negatives for you.
It would also mean that a global karma counter doesn’t exist.
Ugh. I just finished dealing with what turned out to be a simple configuration problem that took me three days because the tool’s documentation sucked. Turned it in feeling bad only to hear that four other devs had previously failed to get it to work.
One important lesson on life is that everyone is bumbling around all the time. (Like me with autocorrect in the first version of this comment…)