I totally relate to that.
For a while, now, I've been utterly unable to finish a game. Not that I'm not enjoying myself, but once past the glorious discovery of a new "creature", its system, its gameplay, its characters, vilains, etc, I tend not to get bored, not to lose interest, but simply to lose that spark, that feeling of "something new". RPGs I will start over many times, just to experience playing a new character, feel the difference, the "newness". In WoW, for example, which I played only for about six months, I must have created close to 25 new characters, some never reaching past lvl 10. The highest I ever got to was lvl 52 with a gnome warlock (Ah, Yhmer, how I miss ya!).
I played Final Fantasy (the original) around 15 times total, from beginning to finish, and once that first time was gone, I could never find the "Ooooooh this is gonna be great!" feeling I got when I first crossed the first bridge after defeating Garland for the first time. Because I knew that world lying ahead like the back of my hand. I had already played it for the first time. All subsequent runs were only re-experiences, not renewed first experiences per se...
There unbearably and ultimately will only be ONE first time.
Great article, Brendan.