I've been hashing this out for about a year and finally settled on clearing out my pipe rack and concentrating on the canadian/lovat shape or variation,,,
Not necessarily the traditional billiard bowl, but straight long shank pipes,,,,simple, straight airway,,,no compound angles for the smoke to struggle through, or a pipecleaner,,,and I guess I've had it with tinkering on these low end pipes trying to get them to smoke properly, I know everybody has a fantastic two dollar pipe that's the cats ass, but I haven't been that lucky to find one,,,,except a four dollar cob, a bowl with a straight hollow stick shoved into it,,,,simple straight airway.
Back to basics, and I'm thinking the canadian/lovat is basic,,,,That and I like the shape,,,