By “favorite fictional character” I don’t mean “favorite character of your favorite fiction”, consider the media itself to be irrelevant.
Just consider the character itself and how it changes throughout whichever segments of its timeline, regardless of how the world moves around it (unless it’s relevant);
the show / book / comic / game / political campaign itself may be absolute trash, but you love some character from that more than any other character from anything at all.
Like Magnifico from Wish, or the driver from Big Rigs: Over the Road Racing.
Nanny Ogg from Witches Abroad by Terry Pratchett.
I just really want to get drunk with her, it would be fucking hilarious I wish I lived in a universe where I could actually get wasted and be totally ridiculous with Nanny Ogg.
I usually can’t decide which is my top pick.
Esme is awesome, the picture of uncompromising competence.
Lord Vetinari, doesn’t like how the world works, but works the world until it is better.
Sam, has such a great character arc.
Nanny Ogg is amazing, with Greebo and her scumple (made from apples).
Well, mostly apples.