This is a first time client who had previously had an all over blonde color. She had some highlights done after the all over color had grown out a bit, but the flatness of the over all color had made her outgrowth fairly noticeable. And even though the all over color was not a bad shade, because it lay in stark contrast to her in-coming gray, it made it look a bit yellow. Doing an all over blonde for someone who wants to completely color their gray is fine, but the upkeep should be done no later than 6 weeks. With this client we were looking for something softer, and she was ok with seeing some of her gray. We did a full head of highlights with three different levels of blonde to blend out her root. Now she has more dimension and we slightly neutralized her palette so it will be more similar in tone to her outgrowth.
I know it doesn't look like a huge difference, but it's going to make a big difference in how natural it looks.