for the first two months, I played on Chieftain exclusively. After building up some skills I made the switch to Warlord and found it to be much more entertaining. When season 4 (tournament) was announced, I decided it was time to step it up again to Regent. After playing through season 4 in the regular division and winning every game by the right victory condition, I am Making the jump to Monarch.
For some fun and slaughter, I may load up a game at Warlord, but that is not likely.
PS: If you just wanna kick some butt, check out game 4-5 in the tournament thread. It is sooooo much fun.