Not all genres are necessarily equally useful for this purpose, though; Fong et al. 2013 note that out of four genres investigated in their study (Domestic Fiction, Romance, Science-Fiction/Fantasy, and Suspense/Thriller), only Romance and Suspense/Thriller were significant predictors of interpersonal sensitivity; which makes sense, since these genres are ones that focus the most on interpersonal interaction.
Reading fiction seems to improve empathy and theory of mind; see e.g. Mar et al. 2009, Kidd & Castano 2013, Bal & Veltkamp 2013, Dijkic et al. 2013, Oatley 2012, to name just the ones that I could find with a very basic search.
Not all genres are necessarily equally useful for this purpose, though; Fong et al. 2013 note that out of four genres investigated in their study (Domestic Fiction, Romance, Science-Fiction/Fantasy, and Suspense/Thriller), only Romance and Suspense/Thriller were significant predictors of interpersonal sensitivity; which makes sense, since these genres are ones that focus the most on interpersonal interaction.