If you listen to the above backing tracks, they all have seem to have different moods, even stranger if you listen to them in different orders, the same tracks sounds different when you come back to it. To me the Concert Ab sounds the grooviest – weird.
If you pick a random scale, and then move to a different random scale, the next scale may or may not sound as nice or even better.
Practicing scales/arpeggios in alphabetic order (c d e f g..) seems different to practing them in 4ths (C F Bb Eb ..)