I cheer for Spain every year. (Family connection, obvious club team connection.) It’s hard when it’s overrun with Barca players though.
But I usually try and cheer for countries with my club players on it.
So I will make sure and watch Portugal, Wales, Croatia, CR, as well. I draw the line at cheering for Brazil though, so Marcelo and Casemiro are on their own. I don’t love France, either, but want Benzema and Varane to play well.
I particularly will cheer hard for Ronaldo and Portugal to do well, even win it all, specifically to tick off CB and the Messi fans.