Great pic!
Off-topic followup on technique: no need to apologize for your left hand. In a Bass Player interview many years ago, Darryl Jones called that the "monkey grip". In short, Darryl said that for tricky runs his thumb is always behind the neck, but when grooving down low on simple riffs (such as most Rolling Stones songs), he flops his thumb over the side of the neck because it just feels good. I couldn't agree more! Of course there are advantages to thumb-behind-the-neck; doesn't mean YOU MUST ALWAYS KEEP IT THERE.
Also in BP, Glenn Letsch said the same thing about one-finger-per-fret: it's an excellent technique, but for pentatonic stuff (box shuffles, etc) it can be comfy to use four fingers over three frets. He called that "the cup" because your four left hand fingers are adjacent, and you're basically using index and pinky. I agree with him, too.
Nothing wrong with variance/versatility. For simple stuff I use "cup" plus "monkey grip", for tricky stuff I use finger-per-fret plus thumb-behind-neck.
/off-topic
Totally agree. Playing the 'correct' one finger per fret with thumb behind rule at all times was murderizing my wirst. Now I play every which way depending on what my hand and wrist tell me. Probably looks like a mess to the uninitiated but I swear there's a method to my hodge podge of fretting techniques.
