I have worn S in so many places, doing so many things. I'm not one of those people who gets all into the stylish carriers and different fabrics and whatever, but I have had several different types of carriers, all inexpensive.
The first carrier I ever tried was a hand-me-down Peanut Shell from my cousin. My cousin is about 8 inches taller than me, so it was probably the wrong size. I took S for a walk when she was a few days old in it, and it felt awkward and not safe. I tried it a few times after that but was never satisfied. I never used a pouch again.
After that, I tried a wrap. I got this one - I think it's a Hug a Bub or something like that - off of a trade site. It was essentially free; I only had to pay for shipping. I loved this. When we do have another baby I want a gauze and/or linen wrap, gauze for hot weather and linen maybe for back wrapping a little baby. I was never really able to get S on my back in this wrap - I think it's just a bit too stretchy. I didn't get too fancy with wrap methods. S would come to work with me, or on sight-seeing trips, or to our church, or on walks. And when she was itty bitty, it was often the only way I could get her to sleep.
When she was getting a bit heavier, around 6 months, I got an unpadded ring sling from an Etsy seller. It was quick and easy, though not quite as versatile as the wrap. But this became our go-to for several months. It leaves one hand quite free and the other one not so free. I don't think the padded rails in other types of ring slings are really necessary, but then again I've never tried one on.
We do own one other carrier - a snugli that ML insisted on registering for before S was born. It's been used 3 or 4 times, maybe. It's just too complicated.