You're right, nobody mentioned it so I'll keep the topic going, I suppose. I've used mixtures of Crisco & beeswax, straight Crisco, water based lubes, saliva and the various yellow, green & white store bought stuff, etc. just to name a few. I'd be less than honest if I said there was a difference. I never found it to be so. The store bought "butters" and so on smell better but Crisco does as well is cheaper and seems cleaner. About the only problem (if you could call it a problem, I don't) with Crisco is it doesn't hold up quite as well in hot weather. I prefer the various liquid lubes for general shooting. If I had to choose my favorite (current) I'd have to say it's the "Black Solve" that DGW carries. Buy a small bottle, mix it with a quart of water and you're set for years. I'm sure there's stuff around the house that would make fine lube.
My first load is always a grease, usually Crisco, patch. If a load is going to be in the gun for much more than a couple hours, I'll lube with grease. At the range and for reloads in the woods I use a wet patch. In my experience greased patches gum up the fowling and make loading harder. Wet patches, on the other hand, dissolve fowling and leave the bore clean after each shot. I've shot dozens of rounds this way without having to swab out the bore. The last shot loaded as easily as the second. A fowling ring does eventually form in front of the powder where the ball stops and should be swabbed out after a while; but you don't have to.
To prevent contaminating or wetting the powder I always use an over powder wad, either a dry patch, wonder wad, wasp nest or paper. the wad itself helps clean out the bore. If I'm in a hurry I forget the wad. Saliva is excellent but sometimes you just don't have any. Though I've never used them, oils such as olive, canola, etc. would probably work well.
The main thing is I don't think the type of lube you use makes any great difference at least as far as accuracy goes. At least I've never been able to discern any real difference. I think there's more made of this than it deserves. We all like to think black powder shooting is esoteric and mysterious with arcane formulas that are only for those "in the know". Horsefeathers! Our forebears had other things on their minds. They used what they could get...and it worked! Otherwise we wouldn't be here. Are some lubes & such better than others? Probably. How you gonna know without going to more trouble than it's worth. If you shoot competition at 100 + yards and there's 1/4 inch between win or lose, it's worth the trouble. Me, I can't shoot remotely that well with open sights. I know most will disagree with me on this but this is my honest opinion gleaned from nearly 45 years of black powder shooting and hunting. I respect contrary opinions as I know others have had different results from mine. Oh, and I make much use of my chronograph in testing.