I’ve made a few, but recently have settled on one kit I really like, so I keep that in Project 1 and then copy the project to a new project slot when starting something else.
I’m totally with you. In the last few years, I went from the DT to Logic to the SP. So it’s a big change philosophically as you say.
Definitely come up with a system for how you use banks.
I have my dry drums in Bank A, and then use either Bank B or the next bank over for resampled versions.
I use the last couple of banks as either the spot I chop to or the spot I sample into and keep the “dry” samples. I then sort of build out toward the middle and as much as possible, I try to keep things tidy by deleting things I definitely won’t need and using exchange to move stuff around.
Be careful, when you make a pattern, it is sequencing the pad where the sample lives, not the sample. So if you move the sample, you will screw up your pattern. For this reason, I resample my patterns into a bank when I’m done, as I lost some work at one point.
For ultimate control, I would suggest mastering the pattern sequencer and song mode. That’s how I built the dub track I did. It’s a very capable workflow.
That said, for the latest beat battle, I used resample to create my track live. It’s a lot more harrowing as your final track has to be done live, but I think this method is likely where a lot of the magic lies, in terms of the old school SP vibe. (That said, I did use pattern mode to build some sections, which I resampled and then combined with other snippets created from resample mode).
Anyway, I’m rambling on, but long story short, coming up with a workflow in terms of how you build stuff, where you save it, and how you do the final sequencing is definitely the first hurdle. A big part of that is learning not just what you can do with effects, but making use of “remain” to avoid stacking the same effect, and here again it’s like playing chess because you need to think about what order you want to apply effects if you are going to bake them in. 
