たらいい・といい

This grammar expresses a hoped-for or desirable outcome. たらいい attaches to the plain form to say 'it would be good if you did ~' (a suggestion or wish about a future action). といい is used to express hope or wish about a situation, often translating as 'I hope that ~' or 'it would be nice if ~' for adjectives, nouns, or verbs. It can be used when giving friendly advice, making recommendations, or expressing personal wishes for a favorable result. In everyday use, たらいい is more directive (what someone should do), while といい focuses on wishing for a situation to occur.