There's a very persuasive, enveloping mythology around meat in this country. Most people seem to believe that vegetarians are only able to remain vegetarian through an extreme force of will, and that, if/when they go back to eating meat, it will seem insanely, irresistibly delicious, and they'll realize they were deluding themselves into believing they could live without the magic of meat, etc.
Neither holds true for me. About six years ago I decided to cut back on my meat eating, for ethical reasons, but ended up giving it up entirely, because I stopped wanting it. It was easy to do without. I'm gradually adding some meat back into my diet (this time for health reasons; now that grains and soy are a problem it's no longer easy to live without meat), and for the most part I find it less than delicious -- certainly way less delicious than I remembered it being. I used to think meat had a pretty neutral taste (the way vegetarians think of tofu, though tofu also has its own taste). Now I think it tastes like what it is: muscles and blood. After I swallow a bite of meat the metallic tinge reminds me of having a cut in my mouth. (This isn't true of bacon, of course, because bacon is salted and smoked within an inch of its life/death and is mostly fat anyway, not flesh. It's true that bacon is the most vegetarian-friendly meat for this reason: it tastes the least like meat.)
I'm curious: If you have returned to eating meat after an extended period without it, what was your adjustment period like, if there was one? Did meat taste like you remembered it? Better? Worse? If different/worse, did it ever go back to seeming normal?