I'm self-taught and I want to check that I'm not doing myself a disservice with my left hand positioning when I'm playing high up the neck (say, above fret 15). I play with my thumb behind the neck, fingers angled 'backwards' down the neck (from my perspective looking down, they point to my left - just a little). This has served me very well thus far I think, and means my pinky doesn't flail around and all fingers stay fairly close to the fretboard.
However, I've been working on a particular fiddly passage I wrote and it's proving very difficult to nail at the intended tempo. I was researching to check my technique and have actually been unable to find a single example article, video, photo, etc of anyone who didn't put their thumb over the top of the neck and angle fingers 'upwards' (to the right if looking down).
While I can see how in theory reach might be increased by this, it feels far less natural to me, breaks the wisdom I've read before that thumb should be behind the neck, and naturally positions the 2nd, 3rd and 4th fingers away from the fretboard some distance.
Basically, do I have anything to worry about? :)
EDIT: Now with video for your comment/critique/enjoyment/bemusement (first half - how I play currently; second half - initial attempts at what I see others do):
Also, this particular passage has been my nemesis for some time. Any tips for getting it cleaner, smoother, etc - do let me know. Or an analysis of why it's so difficult? :)
(At the same time, I have some specific questions around my technique and how I practise. Really looking for some like-minded (and more experienced than me!) folks how I can bounce some ideas off, get confirmation on some suspicions, that kind of thing! Is this site that place, or is there a forum, different site, youtube channel or something else that anyone knows of? I can find all of those things for beginners, maybe some lessons hinting on intermediate/advanced, but oddly the resources seem to cut off at about that point.)