Nicely played JK.
I like what you say about rhythm, fills, back on the beat and also enjoying the swing feel of blues shuffling.
Well played on the piece.
RE: tone, it’s maybe not the dirt that is the issue people are hearing but the eq, it is very bass heavy and booms when you thumb-strum the thick strings.
@ everyone enjoying this blues solo piece …
Are you aware that Justin has a full set of lessons on this style in a module here: Solo Blues Guitar | JustinGuitar.com
And we have a community challenge topic here: Guitar Challenge (Blues Study Pieces) - Solo Blues Guitar (Justin Sandercoe)