In fact, when I come up with an idea for a parody I try to resist the urge to Google the idea to see if someone has done it already because the answer is almost always, "Yes, of course they have, they've thought of it!"
My own personal tastes don't really have an effect on whether song is a parody target or not. But having said that, I try to pick songs that I actually like because I realize that I have to live with these songs for a long time, from when I'm working on them in the studio to possibly playing them onstage for the rest of my life. So I try not to pick songs that I know would drive me crazy.
I'll bet every great thinker and leader we've got
Could see all kinds of things other people could not!
So then why get upset if somebody like me
Tries to look at the world just a bit differently?
I'm free to do what I please, I'm probably not going to do albums. Just because I think releasing tracks as singles is a better way for me to stay topical.