I like playing an early religious game, and there are several civs that stand out of the crowd in particular. The obvious choice would be the Celts, as they have a heavy religious UA, and their other two uniques are above average. Aside from them though, I would like to know what your opinions on which civ you like to play for religion the most, as there are several others that give you significant boosts.
I personally like playing with Ethiopia as their UB, the Stele, is a great and quick source of early game faith, almost ensuring you'll be the first to receive a religion if the Celts aren't in the game. They would probably be one of my favorite civs out of all, although their situational UA and mediocre UU hold back the potential this civ has. If the UA was improved to be more constant, I would definitely play with it more often. A close second for me is Spain, which when played properly, can give you some of the highest faith yields in the game. If you grab the one with nature pantheon as well, then just about any natural wonder you get is worth the grab, even weaker ones like the grand mesa. Its best played for religion when you can find Mt. Sinai, because with one with nature, it will yield a whopping 24 faith per turn. Even without religious wonders like this, any wonder will still give you above average faith yields, which can be fed into great people consistently to grow your empire.
I personally like playing with Ethiopia as their UB, the Stele, is a great and quick source of early game faith, almost ensuring you'll be the first to receive a religion if the Celts aren't in the game. They would probably be one of my favorite civs out of all, although their situational UA and mediocre UU hold back the potential this civ has. If the UA was improved to be more constant, I would definitely play with it more often. A close second for me is Spain, which when played properly, can give you some of the highest faith yields in the game. If you grab the one with nature pantheon as well, then just about any natural wonder you get is worth the grab, even weaker ones like the grand mesa. Its best played for religion when you can find Mt. Sinai, because with one with nature, it will yield a whopping 24 faith per turn. Even without religious wonders like this, any wonder will still give you above average faith yields, which can be fed into great people consistently to grow your empire.
]) their UU's are awesome....I really like how the Dromon shoots Greek fire (if you don't know what that is look 
