To express or state something.

each person

opinion / advice, a suggestion

to advise, to suggest / to admonish

oneself / first-person pronoun: I, me (often shows the speaker's lower position in a hierarchy than the addressee) / (Kansai) you

Synonym of 十人十色 (jūnin toiro, “there's no accounting for taste”)

suggestion box

a photograph of oneself, a photographic self-portrait / (especially) a selfie

to take a photograph of oneself, to take a selfie

talking about oneself (especially, when the audience is not interested)