You pretty much hit the nail on the head, and Kashue is exactly right. I've made several batches not varying anything, and I mean anything, from juice (same kind bought, which is where the variability comes in) to yeast to time to pretty much no variables at all, and they all taste different. I think cider is a lot like wine, in that unless you get the exact same apples from the exact same tree..... Even store bought juice varies tremendously. Once I figured out that I'd never make the same thing twice, I chilled out and enjoy making it the same way, just changing up the backsweetening trying to get the taste I'm looking for.
I've gotten a couple of buddies started with cider since they thought brewing beer would be too hard. Apple juice/cider, sugar to up the ABV, yeast, more sugar to carb, non fermentables to sweeten (if needed), done. There are a lot of things you can do with it once you get the basics down, but the basics don't need to change to have a good time with it. Apple juice/cider, sugar, yeast.
My one buddy is doing a lot of different one gallon batches until he comes up with something HE thinks is palatable, and then he'll start doing bigger batches, but it's all in what YOU like.
My current base reciepe is 4 gallons Harris Teeter Cider, 2 lbs white sugar, and Safeale S05. I keg, and use the last gallon for sweeters. I've used plain apple cider, apple juice, juice and sugar, juice and artificial sweetners, and this last batch I did a half gallon of cherry juice and a half gallon of cherry pomegrante juice. Since I keg and force carb, no worries about exploding bottles, but if careful you can still do it without a keg.