I bury the knots, too, mostly because my attempts at doing it the other way didn't look good. But - as a cautionary tale - the last time I did this, my design called for a LOT of knots. Unfortunately, I stupidly pulled each knot tight using the fingernail of my thumb and the side of my index finger. When the quilt was done, I noticed that part of the thumbnail was suspiciously white and sure enough, the nail had lifted up from the nail bed after all those pulls. I had to cut it back halfway down my thumb, which looked pretty weird, and carefully monitor it as it grew back in. Every time it didn't adhere, I had to clip it back to where it did. Months later, I finally had a normal nail. You might say I won't do it quite the same way again.
Hoping this helps someone,
Charlotte