What do you consider "shallow"?

I've heard it a lot of times that, whenever a man achieves something, liking the man for said thing is considered "shallow". So I am asking, what are the things a man can do, which does not count as "shallow" for liking said efforts of men?

I've heard liking someone strictly for how they look is "shallow". Which is something I personally can agree with. Looks is barely enough to be considered anything serious.

But how about other achievements? If a man did work on his social skills, is it "shallow" to like him for that?

If a man puts effort into a skill that is appreciated by many others, such as stage performers, actors, or similar, is it "shallow" to appreciate that?

If a man puts incredible efforts into his physics, is it "shallow" to appreciate that?

If a man did work on his confidence, is it "shallow" to like him for that?

If a man puts serious efforts into his carrier, is it "shallow" to be attracted to such efforts?

Could you name things a man can achieve and work for, which you personally do not count as "shallow" to be attracted to?