I have only been on the pipe six months or so. I have been unable to find a strict rotation yet, or anything near it. I only smoke one bowl a day, but on a saturday and sunday it can be anything up to six. But it is all higgeldy-piggeldy. Some of the senior members here have described details of their smoking day, it invariably starts with milder smokes, progressively moving on to heavier ones. The routine of it appeals to me massively, but I am a long way from that yet. But that's where I want to be, not just randomly smoking tobaccos that negatively interfere with the taste of the next one smoked.