Yep, good drilling and an even unobstructed airway are important for a good smoke.At the risk of stirring up some controversy, I thought I'd give this a share, only because this conversation has been driven towards how much impact engineering has on the smoking experience. I'm not quite sold on this, but its worth some thought, especially for those who can afford to purchase multiple high-end pipes to test the theory
Airflow: The Key to Smoking Pleasure - Pipedia
pipedia.org
I had a bent lane era charatan that i chipped the end of the tenon, maybe an eighth of an inch chip, and ever after that pipe had a tendency to gurgle, probably because the ragged tenon end was causing water vapor to condense out of the smoke.
Technique is important, but you can only do so much with bad tools.