Hello Christopher Schlegel or anyone. Been working on scales and modes....hope this doesn't sound too confusing in my wording:

Was jamming to a backing track. It was D chords and E chords. So I played some lead in A major thinking that was the key. It sounded pretty good. Then I fooled around in D and then in E with varying success. I wrote down all the common notes in these 3 keys and the only notes not in any of the three were A#, C, and F. So if I avoided those 3 notes it sounded decent. Same with key of C...if I avoided C#, D#, and G# it sounded ok. This may be a backwards way of looking at modes? but does this make any sense?