We'd had a Baby Biorn since Emelie was a couple months old. However, as soon as the babies approached 15 pounds or so, I didn't find it comfortable for long stretches. Plus, I found it difficult to cook or work around to house with a baby on my front.
At wearyourbaby.com I learned how to put a baby on my back comfortably and safely. I made a couple Mei Tai carriers following these directions.
When Heidi was born, we bought an Ergo Baby Carrier. I love how comfortable this carrier is. While I don't like it for newborns, once baby can hold up his head, it's very easy and comfortable to use. This is Bryan's favorite carrier and he uses it for Heidi (2 1/2) or Brigitta (4) at least once a week.
We were considering buying a second Ergo while I was pregnant with Hunter. That's when I discovered the Beco Butterfly. This one is great for newborns on up. My favorite feature is that when baby is strapped in, he can be transferred to a different wearer like a backpack. I also like the waist belt better than the Ergo. This is the one I usually wear with Hunter.
I just completed making a cloth carrier like a Moby Wrap. I wanted something for Disney World for Hunter to face out. More on this carrier coming soon...