My goal in doing a BFT is to share some music that I like. Surprising and hopefully interesting, but it always starts with something that I like. Since I tend to like standards and melodicism, that's largely what you'll encounter in my BFT.
It's a different experience for the BFT listener, since they're going into it cold. It's very possible they'll have a different reaction than if they knew the album and/or artist, because they lack a preconception or frame of reference. Heck, I sometimes have a different reaction from one listening to the next.
I do find too many originals to be tiring and somewhat boring. In my current BFT, track 7 is someone doing Herbie Mann's "Comin' Home Baby." I imagine that if I were listening to the BFT cold, my ears would perk up, as in "Hey! I know that song!"