Also, the question is not “does the personalization value outweigh the reduction in efficiency”; the question is whether the person recognizes the fact that there is a reduction. If you say “yes, I know this is strictly less efficient, but I choose to take the efficiency hit, because I value the roleplaying benefit more” — then fine. If you say “this isn’t any worse! and I like it better like this!” — that’s something else.
Also, the question is not “does the personalization value outweigh the reduction in efficiency”; the question is whether the person recognizes the fact that there is a reduction. If you say “yes, I know this is strictly less efficient, but I choose to take the efficiency hit, because I value the roleplaying benefit more” — then fine. If you say “this isn’t any worse! and I like it better like this!” — that’s something else.