We did EC, so our needs might be slightly different, but we were on the prefold wagon for a long time as well. We used wool early on - I hate PUL covers. Well, I only tried Bummis, and I had one Thirsties that I liked ok, but wool is SO much better.
Once DS was more mobile, it was a lot of naked time still, but when it was chilly I wanted something on his little tush. I didn't want to mess with covers, and I was scared that the snappi would poke his eye out or something
So I got snapping fitteds - some wahm ones, some kissaluvs, and some MEOS. I like the MEOS the best. We are still using them coverless, except at night because he sleeps in his own bed now and sometimes I don't get to him fast enough in the morning before he pees.