Rorschach fighting

[Farmer]

Multiple techniques may be inefficient (well, they are), but it adds character to a character. They're not just better at the entirety of the skill, only selected components, and they stand out because their skill in those things is truly above most others.

Just as it's generally more efficient to take higher stats, it's not always desirable from a character perspective. If someone was self taught, it's quite feasible that they're better at those techniques because they used them a lot and practiced them, rather than spending time "efficiently" learning a broader base skill set.

IOW, a character with character can be more appealing and fun and interesting than one built with efficiency (min/maxed).