A few years ago I switched to decaff because I was worried about what caffeine was doing to me. I still enjoyed a cup of regular coffee on occasion but not often. It certainly tastes better than decaff, which made it a real treat.
I've recently switched back to caffeinated coffee. I do feel a little different and I'm in the process of adjusting my sleep- which is not that much of a problem, but shoot... for the cost (about half the price of decaff) and the taste (1000x better than decaff), I'm willing to make some sacrifices.
Besides, I don't really believe caffeinated coffee is really "bad" for you. Some people handle it differently than others, so I suppose it's a highly personal thing. It may be really bad for some. Others may do better with it.
For me, I just really like it. I "need" it every morning psychologically because it's... well, it's part of my morning. It's not a need for caffeine, without which I'd die. A good cup of (usually black) coffee is my favorite breakfast. The smell, the taste. It's warm and comforting, and strong.
Edit: It's like enjoying wine for me too. Different flavors and roasts, various brands and brew types. I absolutely LOVE coffee from a French press, and my local coffee house has some AMAZING organics.