In informal contexts, first-person pronouns (I and we) are more frequently used—this makes for sentences that use the active voice. On the other hand, you’ll typically see passive voice in formal settings, particularly in official or academic writing.

Yes, it is correct to say “persons” if you use it in the right context. “Persons” is one of the plural forms of “person,” but we only use it when writing legal documents, in law enforcement, or when referring to a group of humans as individuals and not a unit.