If you want to effectively play The Blues — or any style of guitar, really — you need to get off your chair, strap in your guitar, and stand up!
Too many people go lazy and play the guitar while sitting down. YouTube is filled with guitar sitter performances.
Sitting down while rehearsing only creates bad habits. You will tend to turn the guitar towards you for a better view of the strings and fretboard and that is cheating.
When you stand up and play, you can’t easily see the front of the
guitar unless you bend over it and look and that’s a really dumb look
on stage and yet you see it all the time.
When you stand up and play, you have to know where your fingers are in relation to the frets and you can’t look down and see how your pick is hitting the strings. You’re playing on the faith of muscle memory and that faith never develops in rehearsal if you only play sitting down while staring at your strings.
Great typists never look at the keyboard — and the same goes for great guitar players because they can play with their eyes closed and still get the same, ringing, results.
If you close your eyes and you can’t find your chords — then you are not practicing fairly and you are cheating yourself out of a mastery of the guitar many long for but few conquer.