conceited

offensively self-assertive

too confident or sure of one's ability etc

self-assured

put forward as dogmas; (of a person, statement) expressing opinions in an arrogant way

dictatorial, opinionated

interested mainly in oneself

thinking very highly of oneself

having or showing a high opinion of oneself

arrogant

thinking mainly of oneself and one's own wishes

thinking only of oneself

too pleased with oneself and one's abilities and without kindness for others etc

pleased with oneself

(behaving) like a snob

haughty