I almost always play epic. However, after following the insane 30 civ AW thread for a while, I decided to try it myself (I usually play Emperor, so I played the Always War on Regent with random everything, barbs roaming, large map with 12 civs).
It's been a BLAST so far! I have actually won games where I never once went to war, so you can plainly see that I am the "builder" type. My current game has really sharpened up my warring skills. Plus, being able to move back to regent has actually made the game more fun (2 content citizens?! I can research faster than the AI??! Woohoo!!
After trying that, I might even try one of those 5CC games -- I'm afraid that I would miserably fail at OCC....