As I only smoke out doors, I can't rely on sitting in a cloud of smoke and smelling it, to pick up the flavors of what I'm smoking. So I've spent a bit of time, effort, and money, to figure out what moisture levels bring me the most intense amount of flavor and I draw the smoke in and expel through my schnoz. Overwhelmingly, that moisture level is just shy of bone dry. I'm looking for tobacco that feels dry to the touch when squeezed twixt thumb and forefinger, no sense of the water in it coming to the surface while squeezed, maybe crispy at the ends, but still pliant. If it's crumbly, I'm not going to get a good smoke.
So it's not about length of time, it's about level of moisture. I don't own a gauge but I've learned what the tobacco should feel like to give me the most during a smoke.
Pack it so the draw is still easy and smoke it so that the cherry is barely going, just enough to simmer the tobacco surrounding it. I get the most intense flavors when the pipe is kept going on the verge of going out.
Let the smoke gently drift out through your nose to get more of the flavors.
Too much moisture masks the flavors in a blend. Some may prefer a blend with it's flavors masked by excess moisture. I'm not one of them.
Too fast a cadence robs you of the flavors in that blend.