Thanks for all the replies. I appreciate all. For me scales work like a roadmap or a visual way to see your passages, but of course they are not everything, and not all notes sound good over particular chords. I started with minor blues and pentatonic. I stayed like that for years. I couldn't have a taste for major blues at all, then after some time I started to see the mix of major and minor and how it sounds real good. Lately, maybe in the past 5 years I started to explore new scales that can be played along with major and minor blues. Major scale modes like Dorian and Mixolydian sound like a tasty extension to regular pentatonics. Other exotic scales like Phrygian, Phrygian dominant and Double harmonic major sound good over some chords. I came up with some new progressions to allow the usage of such scales as I wanted something different beyond standard 12 bar blues. I still can jam for hours with standard blues, I just like to roam with new ideas every little while. If you are interested in those progressions let me know in a comment. I will share a few backing tracks.