I take it pipe by pipe. With artisan pipes, I would rather buy from a selection of completed pipes than commission one, since I am more likely to find the complete package appealing rather than simply float my ideas (even in considerable detail) and hope for the best. But if you have an artisan who really speaks your language, it could be ideal. Much to be said for artisan pipes, and I own a number. Factory pipes can be excellent dollar for dollar. Having a production line can actually perfect rather than degrade the end product if the people on the line are crafts people, and many are. I don't think I could confine myself to one type or the other. Some factory pipes, some of the old name U.S. pipes for example, have a quality of design that has both cultural context and imaginative depth, sort of like 1950's automobiles.