Having read through this entire thread, i feel obligated to respond. I feel that everything has its place.
Bong- I have an 18" glass piece that a friend of mine made. I have had it for years, and it is my workhorse piece. With a screen, it is extremely efficient, and a lot of times I will even spread a bowl out over two or three sessions. If kept clean, you can really taste the weed, which is the most important thing that the bong offers for me.
Pipe/bowl- I have 3 glass ones. I have gone through many over the years. They are great for smoking on the go, or ducking into a little smoke nook on the street. Otherwise, I would always go bong.
Joint/blunt- I always associate both with social smoking. Otherwise, I want to taste my weed without paper or tobacco. They are very portable, but I would never roll anything really great. If you are smoking anything really high quality, they clog themselves by the end, and can become a sticky mess, even with a filter.
Vaporizer- I own a Vapir ONE. I have 2 close friends who own Volcanos. They are smooth, get you really stoned, and have a certain novelty to them. They are however, a big pain in the ass, and give you no taste. For that reason, I would never put my finest stash in one.
So i think all methods have their merits, but I will always go back down the same road. If all weed were created equal, I would not care even a little bit which way I chose to smoke it. Fortunately, all weed is not, and I will celebrate the greatest with my bong in hand.
Oh, and I only get around to knifing on April 20th, when I do a tour of all methods (and plenty of cooking as well). It really is pretty awesome, but I couldn't do it every day.
-S Town