Physical, emotional, and intellectual skills can all be measured and quantified.

About the only truly subjective one is artistic talent. Although that may be measured by popularity, but that doesn’t measure the talent as much as it measures popularity.

Because psychological quantification is dependent upon the method used, results are approximate at best. When I was in college in the late sixties, one question frequently appeared on psychological course exams, “What do intelligence tests measure?” The only correct answer was, “The test measures itself.”