I find that, for my uses, feline pine clumping is the best one. If I miss a day scooping, it doesn't seem to matter. It does track some, but I like the way it clumps a lot. My Leo is a five year old male and he's literally obsessive about digging in the litter pan and then burying his waste--and making sure everyone else's is properly buried, as well. He sometimes goes on half-hour burying fits which, with any of the clumping clay litters I've used, has resulted in the clumps being broken up so that I have to just change the entire tray. The feline pine, I find, doesn't break up as badly. Because of that, for my circumstances the feline pine, despite the higher cost per bag, is actually the most cost-effective litter for my babies. All of our cats accept it very well, even the new babies that we just got (we did have a very small tray of clumping clay for the babies when they first came home, but we moved it closer and closer to the feline pine box and then the kitties started using it, without even mixing the litters together).
In the past, the silica crystal style has worked for Leo, my big baby, but a) it wasn't very cost effective and b) I'd rather scoop out ALL the waste regularly. I also had good results with clumping clay and Leo, aside from the previous issue mentioned with him breaking up the clumps. When he was an only cat, the breaking up of the clumps wasn't really much of an issue. With two cats, it became an issue because, without changing the litter completely at least twice a week, I couldn't keep the litter clean enough to keep Leo from going outside the box (he's picky and we basically came down to the choice of paying exorbitant amounts for cat-attract litter and changing it multiple times a week, even with multiple boxes or trying the pine). I also like that the feline pine is flushable and it smells really, really good. It eliminates the odours of cat waste very effectively and releases the scent of fresh sawdust into my flat when we scoop.
With the feline pine, I put in about 3 or slightly more inches because of Leo and his need to dig constantly. For our smaller babies, who are still in quarantine, I only put in about 1 inch, largely to keep it cost effective since we have to switch the litter out regularly to avoid re-infecting with their giardia.
With kittens, though, you very much might want to avoid clumping in case they ingest it, which can lead to blockages. If you have a cat with asthma, you'll need something low-or-no dust. If you have a cat with pica (eats inappropriate things) clumping can also lead to blockages. With a healthy, adult cat, I don't, personally, see a reason not to use clumping.
Overall, I guess I just think that litter is a very individual choice based upon the needs of your animal(s). What works for my cats and my lifestyle and my household might not work for yours and what works for your cats very well might not work for mine because of Leo.