My go-to is always ice cream flavors. Simple enough for people to quickly make decisions, but also highly subjective.

Most other comments so far are misleading. You shouldn't do "favorite" or "best" in forced ranking. It needs to be something that's on a continuum and is subjective. Typically, you say "rank features in order of importance," not "most important feature," or "rank from most delicious to least delicious" rather than "favorite ice cream flavor."

"Favorite" is a single data point, not a continuum. And it's not subjective, since others don't get an opinion on what someone else's favorite is.

Once you get enough answers here, you could do a ranked-choice poll on which question is most suitable for a ranked-choice poll too!

Give people a top ten list (movies from the 80s, e.g.) to rank.

Which system will you use?

Some examples that I could think of, where you would have a predefined list of maybe up to 10 choices to not overwhelm people:

favourite colour favourite movie genre favourite music genre favourite name favourite actor/author/athlete

You could of course also do the poll for the least favourite thing.

Any order of preference, for example: Preferred style of music (multiple styles of musics to rank from best to worst) ?

Favorite textures to eat.