Here's a good example of something that would be one of my "throw away" songs. The riffs that I come up with when I'm just fucking around on guitar usually sound a lot like this, 3 or 4 power chords, simple hard rock stuff, but this song isn't original or complicated enough for me to keep it (if I had written it). If I had come up with this riff, I would think to myself, "this sounds like something KISS or AC/DC would play," which means it gets disqualified. Because my songs aren't supposed to sound like KISS or AC/DC. They're supposed to sound like Kevin Griffin.
That being said, I really like this song, and the fact that it sounds like KISS just makes it even more awesome.