Just because I can I'll reiterate my criteria for purchasing a pipe. First it must catch my eye as I scan displays in shops. A pipe which isn't bent to some degree will never stop my eye. Then it has to fit my fist, comfortably. I examine the fit and finish for anomalies. Everything must fit well together. I'm not opposed to metal decoration but, such must be silver or gold and perfectly installed. If the pipe meets my criteria I'll more than likely purchase it. The "rubber meets the road", so to speak, when I've smoked ten or so bowls. Since I've started using my criteria I've not tossed a pipe for poor performance. Luck and 60+ years of experience Have taught me a lot about purchasing a pipe.
And, again, if a pipe doesn't please my eye or fit my fist, ahd clench comfortably then, the smoking experience will be unsatisfactory. Smoking for me, beside the nicotine, is a sensory experience for me when relaxing at home. When I'm working. it's the nicotine but, the senses, all the senses still enter into the equation. I can't speak for others.
The above doesn't apply to cobs. I consider them to be expendables when fishing, driving the tractor, chainsaw or what have you.