A grown-up nerd.
(It must be noted that--typically--the burgeoning intellectual may/will suffer his/her nadir of social popularity between the age(s) of 12-21. However, after pubescence, everybody realizes how very interesting they (i.e. the intellectuals) are b/c they (i.e. the intellectuals) chose to stay inside, cultivating a personality, while the rest of the general population was drunkenly scrambling to remove their clothes.)
Being an intellectual
, Tim M. Fenton used "The Dark Knight Returns" as the basis for his thesis on the influence of genre fiction in 1980's American literature.