WieWaldi But it cost me always a lot of time to learn.
Fingerings are a big overhead in the initial process, but so worth it to figure out good ones!!
WieWaldi Another reason was: What if a good sight reader would play this, would he go instantly for the standard scale approach but be good enough to do the jump on the fly. Or maybe an advanced pianists can play everything nice even with a suboptimal fingering. On the other hand, an advanced pianist has more muscle memory patterns already built up and is able to pull those off. Then my mind came back to the sight-reader...
Honestly it's probably a mix? Some of the stuff I see what's coming next so I accomodate, and some I'm doing super awkward things and tripping over my fingers. Maybe I can make it sound good but it's terribly awkward to play (like ending up with thumbs on black keys when I don't need to).
When I'm learning a new piece, as I'm going along I'm writing in fingerings or rewriting them if they exist and I disagree with the editing. And sometimes as I pick up the tempo I realize why they wrote it that way! Or sometimes my own fingerings are better for my small hands.
I think if you're going to continue to learn and grow as a pianist, finding good fingerings is so critical. And it's worth figuring it out early when learning a new piece so that you don't commit your muscle memory to something awkward and have to relearn later š