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Self-assured would also work in this context. Self-assured can have either either positive (he is confident) or negative (he is deluding himself) connotations.
Idiomatically, he "marches to his own beat." Self-assured would also work in this context.
Idiomatically, he "marches to his own beat."
Self-assured would also work in this context. Self-assured can have either either positive (he is confident) or negative (he is deluding himself) connotations.