Simple question from a "lifer," which is better as a first pipe, a briar or a cob? I'm setting aside clay, Meerschaum, and other alternatives, although of course, people start where they start, and anything is possible and maybe desirable for individual people. In terms of cost, an MM cob is undoubtedly one best option. Cobs are light weight, easy to smoke, and make it easy to learn basic techniques, easy to clean, and absolutely the least expensive for someone who wants to see if pipe smoking is for them. You can smoke any blend or single-leaf in them and get fine results.
My argument for briar would be that it is the best known and most classic of pipe materials, though this is not to diminish the historical and cultural eminence of clay and Meerschaum and other materials. If you master smoking a briar, you have cleared the hurdle of the most common pipe smoking tool in current use. Briar pipes cost more than MM cobs, in general, but it is my contention that, with some research and shopping, most people can purchase a good smoking briar, new or used, for forty to sixty dollars, sometimes a little less.
If that cost is not an impediment, I'd probably steer a new pipe smoker toward briar. A little higher price might raise their expectations and increase their determination. I don't think a person needs to spend a hundred bucks or more to attain those goals. Obviously, a hot young trader with Goldman Sachs ought to buy a six hundred dollar pipe, whether he stays with pipe smoking or not, just to accommodate the life style, but that is not my world.
So, I'd say, either a MM cob or a briar is a good choice, with me tipping toward the briar by a hair.