São Paulo is great, but Minas Gerais 100% has the best and more welcoming people. Back in the day they used to feed people doing spiritual and work walks, and that is still very active to the point that they will instantly start cooking or breaking as soon as you arrive in their home, invited or uninvited. Btw you do not need to let people know you’re visiting, it’s very cultural just to show up, which is why Mineiros houses are always clean since they are ALWAYS expecting.