I've done balyage before (though only a few times) and loved it--I think it allows for a really natural look and it takes FAR less time than foil highlights (a big plus in my book). For my brown hair, my stylist lifted off what she called a "veil" of hair (basically right around my forehead/crown) and didn't put any color there so that when it fell, you got these pops of light color flashing out, but no obvious roots to have to maintain. Your hair is much lighter so perhaps not such a factor for you, but I liked the really natural effect. I think it gives the stylist a little more freedom to be "artistic," if you know what I mean, and place color naturally rather than in set little foil packets.