I have two young cats (still kittens) and have been experimenting with different litters and types of litters. I have come to my own conclusions about things also.
First of all, I set up 3 litter boxes, 1 per cat and 1 extra. It didn't make a difference, they both primarily used only one of the boxes. So I have gone down to only using that one box.
I made giant boxes out of large rubbermaid containers so they could have a full 4 inches of litter. It made it next to impossible for me to tip the container to dump out all the litter. I finally went down to the high-walled Rubbermaid litter box, and use maybe 3 inches of litter.
I prefer scented over non-scented, but some scents annoyed me terribly. I don't like Fresh Step, but didn't mind Scoop Away. I liked Precious Cats alot, but I can only get the non-scented on. PetsMart brand of clumpable is the dustiest. I think Arm and Hammer STINKS and doesn't clump well. Tidy Cat clumpable wasn't a favorite either.
I once bought Tidy Cat for Multiple cats, but the non-clumpable one, by mistake. It turns out that for me....it wasn't a mistake. It is my favorite kitty litter so far. I like the scent, it isn't terribly dusty. There is very little waste each day, only the poops. With a good stirring, the urine dries quite nicely. It lasted nicely for a full week, then I dumped the entired thing, rather than feelign like I was smelling stuff with the clumping after a few days. To me, I just smell the urine smell with clumping, even though it's removed. I don't understand why, maybe it's just my sniffer.
At under $5 for the larger 30 lb bag, which by the way goes farther than the clumping one, once again, I don't know why....the one bag would last me 2 weeks, for one litter box, for 2 cats.
I swear I don't know why it seems to work best for me....it just does. I keep reading that everyone prefers clumping....I'd like to know who prefers non-clumping?