Unfortunately, this is a huge matter of personal preference. I registered for and was given a Moby Wrap and hated it. Too difficult and cumbersome to use, and when DD was crying, I didn't have a lot of time to try to get it right/adjust it, etc. Others, though, swear by it. I carried DD in a Chicco carrier (front carrier) all the time and it was our go-to. She slept in it, calmed down in it, and it was a life-saver. (It was also cheaper than a Bjorn or Ergo.) We were then given a 2nd front carrier that I didn't like that much (it was a hand-me-down) but as DD got bigger, the way it sat (with her weight on my hips instead of higher to my chest/strapped to me) was more comfortable. (DH continued to use it for DD even through this summer when she was 22 mos.)
We plan on using the Chicco again for DD#2 due in April, but my sis also has another front style carrier that she will probably pass on that I might try as a back-up, as she said she preferred it, but since i haven't worn it, I haven't figured out how it stacks up, comfort-wise, against the Chicco.