This gets a bit wordy, so if you’re into light reading, you might want to click away now!
My current interest is in the blues. If you’re playing blues guitar, you may never play a major scale in your life, but you should know what they are if you’re ever going to play in more than one key. The blues is usually based on some variation of a 12 bar pattern that repeats over and over. I’m probably not telling you anything new there.