This is one of my favorite topics! I've tried
lots of different baby carriers and would be pleased pass on some observations.
I started out with a Fisher Price baby carrier from Toys R Us. It wasn't very comfortable and it wasn't long before I started looking for something better.
Then I tried a Baby Bjorn. It was way more comfortable than the FP, but only for a couple of months, and then the baby outgrew it. Other limitations of the Bjorn: it holds the baby dangling by the crotch, which isn't a very natural way to carry a baby (doesn't seem like it would be very comfortable for the baby either!), and it can only be used for front-carries, not back-pack style.
Then I found mei tai style carriers. These are the best, IMO! They are super-versatile, they can be worn on the front or on the back, and they can easily be worn by different people of different sizes. They distribute the baby's weight well, better than any other carrier I've tried. My favorite brand is
Kozy Carrier, but there are lots of companies that make this style of carrier (just google for mei tai). Or check out a store that sells multiple styles and brands, such as Attached to Baby or Peppermint.
I also like ring slings for wearing to church or any place where I'll be sitting down a lot. Also, for me, a ring sling is the best thing I've found for being able to nurse discretely. I've been through a similar refining process with trying to find better ring slings:
My first was a Nojo brand from Babies R Us. It was heavily padded and pretty comfortable, but rather dowdy looking. I saw a picture of myself wearing the Nojo at Christmas time and was prompted to go on a quest to find something more fashionable!
I next tried an Over the Shoulder Baby Holder that was a little better looking, but still heavily padded and rather bulky.
That's when I discovered TBW, the baby-wearing forum, and from there I found Zolowear slings. They are so elegant! I have some in stretch cotton and one in silk brocade for special occasions. It is so nice to have something pretty and practical for baby carrying!
Now, you asked about pouches. I've tried Peanut Shell and Hotslings and liked the look of both but never could get really comfortable in either. In my experience it's hard to get a good fit in a non-adjustable pouch. For a one-shouldered carry, I prefer either a ring sling or an adjustable pouch like Kangaroo Korner adjustable fleece pouch or Pea in a Pod (custom hemp fleece pouches that feel like the more comfortable sweat shirt material).
Wraps can be super-comfortable but in my experience a pain to use and difficult to keep clean because it's hard to keep them from dragging on the ground when you're putting them on. I've tried Didymos, which is very popular in Europe, and Hug-a-Bub, an Australian wrap. Both comfortable, but I never really found the wrap love and I ended up selling them.
Maybe this was more than you wanted to know, but if you want to talk more about baby carriers, I'm up for it! :)