I really dont have a rotation . I have a wall stand w/ my favorite 6 Kaywoodies and theyre on the wall in the bedroom . I have a stand on my piano that holds 6 cobs . I have a brass pipe stand that has a fox on it and holds one pipe .. the pipe I'm smoking at the time . The other 35 pipes are in a box [ cause I never finished my pipe cabinet at the old house ] . I'll take a half dozen , at most , pipes out of the box and put them in my Pipe tobacco blend cabinet . I'll smoke those pipes for a while .. at least 2 weeks and sometimes a month +- . I like to do it this way because I get to smoke the six pipes in the cabinet alot . If I kept all my pipes out , I dont think I'd smoke each one as much . The cool thing is I always have my favorite Kaywoodies and a bunch of cobs out . A long time ago when I had 3 or 4 pipes ... Yeah , I rotated and it was a good idea . About 15 years ago I had over 200 pipes in my personal collection [ a perk from buying collections as a shop owner ] and I can honestly say that a good number of those pipes were smoked only a few times . I had a ton of high grades of Traditional and freehands shapes . In the late 90's I took out the pipes that smoked the best and gave away and sold the rest [ my uncles pipes dont count ] . I ended up w/ a dozen pipes . Most of them werent high grades . Only three were freehands . Since then , I look at a shape and buy a pipe that I think I'll enjoy , off ebay mostly . I've gotten some old pipes , like Whitehalls and Marxmans , that are cheap pipes that smoke off the map . Sometimes I'll get a cheap pipe and it just smokes ok , but I'm finding that the odds have been good for ebay scores . Tell ya what , I bagged an old pipe marked " Jet " France ... it's a large thick walled billiard that is unreal ! I also bagged a Hilson Mondial Meer lined Chimney that is about the best pipe I've smoked , next to my ancient Gourd Meer ... it's the limit ! Anyway , The high Grades will get you a good or better smoker 99 % of the time . The cheaper old pipes I 've gotten are good or better about 75 % of the time . High grades arent over rated so much as cheaper pipes are underrated . I think the older Kaywoodies are the best pipe for the money in the world . I'm also starting to learn that a Grabow pipe w/ a filter is super freakin nice . It's nice to know that you dont need to be rich to enjoy the pipe as much as a rich person . If I didnt have so many pipes , I'd want to at least have a dozen . It just sounds cool Are you guys like me or do you systematically rotate your pipes ?