I personally have never liked the "spiritual" trait that much; I rarely change civics and usually don't have a religion, so I never use it enough for it to match up to something like aggressive, which helps me build barracks faster and get better melee/gunpowder units! Plus, in late-game play, spiritual's double building speed ability even peters out, making it essentially useless. And adding it all up, you get what? Maybe 6-7 extra turns from no anarchy? No way, spiritual is the worst one (though I used to like it more, but now I turned warmonger)
Anyways, my favorite civ is Julius Caesar of Rome, because charismatic helps my units get upgrades faster, and organized helps me conquer more cities faster with less consequences.
My second favorite? Toku, because in late-game play, his gunpowder units get Combat I, City Garrison I, and Drill I!!!! Plus his UB is totally useful if you have no coal.
Edit: That's not including other upgrades from Barracks or West point of Great Generals, I get quite a lot of those...
I still think Spiritual is a strong trait. You might save 6-7 turns if you switched as often as you do with a normal Civ. However, with Spiritual you can change more often. Slavery is great, but after you've rushed in some cities you can go into Serfdom (weak Civic overall but better than Slavery if you're not rushing) and then switch back in time to rush again. Part is play style also - I usually adopt a religion for diplo bonuses and usually switch twice in most Civic Categories (Organized Religion - Pacifism for example).
I take it you're not playing BTS. In BTS Julius is Imperialistic/Organized (which is still good). If you're able to go on a Prat rampage Organized is very nice.
Never did care for Toku. I agree the Shale Plant and Samurai are pretty good, but I disagree on the traits. Even if I'm warmongering, I like to do it from a Tech lead and Toku has no economic trait. His Gunpowder units are great, but it takes him longer to get them. You might like Churchill - Drill IV Redcoats with 8 XP's. Admittedly I prefer economic traits (Charismatic is both peaceful and warmonger trait and is very good).