When i should/shouldn't use git pull --rebase

When i should/shouldn't use git pull --rebase

Already checked those questions:
When should I use git pull --rebase?
Git commits are duplicated in the same branch after doing a rebase
When will `git pull --rebase` get me in to trouble?
but what i don't understand is that some people say that you should always
git pull --rebase and also others went to setting it as a default option
when pulling and others said it's creating a problem.
I'm facing the duplicate commits issue in git log and i guess it's because
of --rebasing in the wrong time where we should only pull, I know that the
difference between git pull and git pull --rebase is that git pull is
trying to merge both local and remote while git pull --rebase replicate
the commits.
Scenarios:
when i start my work and before doing anything new i need to pull other
developers changes, should i use git pull --rebase or only git pull ? and
why?
when i work and commit and decide to push but then git asks me to pull
first should i use git pull --rebase or git pull? and why?
when I work and commit, work and commit (loop) and then in the middle of
my work i need someone's else changes before i continue my task should i
git pull or git pull --rebase ? and why ?
Thanks