Yeah, JW, initially after the split, Dennis was promoting himself as "The Voice of Styx." The courts said that he could not label himself as such. They kept the band name (although the only original left in the band in Chuck Panozzo, and that's only on rare ocassions), as well as being allowed to use the catalog of music-including everything Dennis wrote for the band. He still performs all of the Styx songs as well. I've watched a few recent youtube vids of his, and his band even LOOKS like th guys from Styx. Recently, they removed his name from the band history on their official website.
PaperDog, one of the things that I took from the interview is the idea of looking past the initial feelings of excitement for a developing song and recognizing it's true potential. It's easy to get caught up in the moment and think that something is really good, only to find out later that it's not really that hot. What I took from it was the idea of tuning in to your own personal B.S. meter-recognizing when something is less than what it could be.
As an example, I can remember, early on in my band experiences, we would record our practices. At the time we were playing the material, we could have sworn that we sounded like pros!

I learned quickly to let the excitement pass and then go back and listen...more often than not, I would here everything that was wrong with it...sometimes to the point that I would scrap ideas that we had worked on for quite a while.
The point is that part of being a songwriter is recognizing when something is truly worthwhile. I'm not speaking in termns of what an audience likes-and I think you demonstrated that point clearly with the "Macarena" reference. You are correct. Who would have thought that would be such a big hit? I mean, someone did-and they were absolutely right on, but I don't think that this is the kind of ting that Dennis was talking about. While he mentions "hits", I apply what he says more to the idea of "quality". I think, in those terms, it is certainly possible to train yourself to recognize when you are producing quality, versus producing mediocre material.
Don't know if all that makes sense...