Any variation of “After the first ten hours, it gets really good” isn’t acceptable, and we shouldn’t look down on people who don’t invest the upfront hours for dividends of entertainment down the road.
I focus my free time on comics, games, movies, anime and television (hence the kick-ass site) but not in equal measure and not always with the same ferocity. Why do interests ebb and flow from one medium to another? Is it my personal tastes that change or the products themselves? It's a nature versus nurture question...where the stakes have never been lower.