I have to say the Philippines. The statistics of religious percentages seems to bear that out.
But you also have to experience living here, too. Christmas songs start in early September! Major stores' PA systems offer daily prayer, where most shoppers will stop for a minute to bow their heads and murmur along with the prayer.
I'm not Catholic, but my Filipino wife is. I've learned a great deal about humility from her.
America has lost its way. Many of the so-called religious are filled with too much ego and greed. Many of them are arrogant, thinking that they know it all, but there is so much more to learn from Scripture. Those who live of ego are not religious. Their religiosity is a pretense.