I guess you could say I rotate, but once I load a blade into a razor I usually stick with it and rediscover it's strong points. Currently, I've been using the Edwin Jagger DE89. I used the Muhle R41 almost exclusing for a pretty long time, same with the Merkur HD. Now I'm back to the DE89 and happily getting nice irritation free shaves. What's your current 'go to'?