Being yourself is only really good if you're really good.
Trying to be better than yourself is better.
Being yourself is only good if you're really good? Gosh, you're depressing! People should learn and grow. Trying to pass yourself off as perfect won't get you hired on my team. I'm much more interested in capable and curious, rather than perfect and arrogant. They tend to work harder, play nicely with others, and their teams stay productive.
1.79 x 10^12 furlongs per fortnight -- it's not just a good idea, it's the law!