Его самоуверенный характер часто приводит к спорам.
Definitions
Holding doggedly and often unreasonably to one's own opinions; dogmatic.
The opinionated critic refused to consider any viewpoint other than his own.
(of software, frameworks, or designs) Providing strong, predefined conventions that guide users toward a particular way of doing things, allowing limited flexibility.
Rails is an opinionated framework that favors convention over configuration.