THXXXX Johnny. It makes sense. I assume if you want to keep it simple you can always stick to the Major, Major 7th, Minor 7th.
Maybe it was a bit confusing. Say you are improvising a sax solo in Tequila. You know the key of the song. How would you determine which scale of the three (blues, Pentatonic Major or Minor) to use? Hope that helps. THXXXXXXXXXXXX