> loses himself in unimportant stuff, If you mean he is perfecting an aspect of the code that isn't important, that is a notorious engineer/Asperger's problem,

> loses himself in unimportant stuff, If you mean he is perfecting an aspect of the code that isn't important, that is a notorious engineer/Asperger's problem, which is a great strength when properly directed. It's hard for me to believe that a software developer would have no empathy for this character flaw, so maybe that's not what you meant.