One should, based upon my philosophy, define that for themselves. A set standard, such as a benchmark, has been shown to fail...miserably. It's hard to determine how much is enough but I think, at times, you can generally realize when you don't have "enough" of something. Hehe, I believe that we need both, I just realize that effectively, nationalized citizens are more "useful" and efficient than knowledgeable ones. Well..maybe not interesting but, entertaining. With that being said, I didn't have the sheer willpower to see all 12. Although it gets easier as you hit new game +. I think I played Chrono Cross when I was..8 or so. I always attempted to get 100% but my will would wane. The more senseless what I was doing was, the less I started to care. Only a few games have kept me interesting, such as Lost Oddseey. The side quests were a bit more interesting than the actual story lol. Oh, lordy, Wild arms. Those games...lol.
I've always been a fan of video game soundtracks. They seem to be an interesting mix of orchestral and modern influences. I find it more entertaining than most classical music and symphonic music. Would you agree?