[Djangolad]

Great question shred
My way of thinking is kind of Zen like. That is you might want to learn all the theory but then you must unlearn it and empty out so the song can be itself. If you consider a lead solo by theory only how r u ever going to give the song it's own soul.
If theres any one mode to get a hang of it's got to be the major.
Minors and pentatonics have an immediate sense of sameness about them. Melody is #1 consideration, you can do more of that with a good understanding of the major scales and an open mind than yo can with many of the other minor scales.
But knowledge is power bro, the more you know the further you go.
Just remember though that your intuition is Boss.