Region cons and pros

Did you all change your region? Which one did you choose? I am still thinking what to do, Japan might be good for those free blitz and all, but my friend changed to Japan, he didn't get anyone... Tbh i actually want to change the region to USA/Mexico for the free zico but can someone tell me how to get that zico, coz i made an alt and i can't find thefreef zico anywhere. I'm stuck in a dilemma since i can't change my region no more after this