Human nature wants to categorize everything, but in reality I'm all over the place. Mostly a solid level 8 out here in the west.. But I suck at moguls because my knees are old, and I've never skied east coast hardpack (ice). Put me on an icy moguled blue run in the east and I'd probably cry like a baby. Which does bring up another twist.. regional differences. A western skier used to softer snow, deep pow, open bowls, and an equivalent east coast skier used to ice, tight trees - make em switch places and weaknesses will probably reveal themselves.
I think the rating system only really applies for equipment rentals and demos, and bragging rights at the bar. Any other time I'm out having fun. I'm ok with just being gaper vs non-gaper.