I'm a first timer, so we'll see what works, but I definately have in mind what I --think-- I like most. I have mostly small and OS Fuzzibunz and AMP pocket diapers, (about 20 total) plus we bought a ton of microfibre cloths to use as extra inserts, since the AMP are also very easy to use with the insert laid flat inside, instead of stuffed (more like a prefold and cover). I also have about 10 kushies AIO's that are in pretty sad shape, but will work in a pinch. We'll pick up more to fill out our stash once I've confirmed what we like. I'm hoping to stick with the AMP's, and they're made locally, so I can run to the store and pick some up without ordering.
Then for the newborn/xs stage I have four new kushies AIO's, three fitteds, and I picked up a set of 10 bummis prefolds and two covers. I won't buy any more newborn size diapers, like someone else said, I'm taking full advantage of all the samples that we can get, and then I'll probably buy a costco sized box of newborn diapers. Once those run out, hopefully baby will be closer to the OS and small diapers.