Pleasant - pleasant person, pleasant day, pleasant atmosphere, pleasant dream, pleasant company.
peaceful - peaceful place, peaceful country, peaceful thought, peaceful state of mind.
modern - modern technologies, modern house, modern fashion, modern history, modern conveniences.
interesting - interesting story, interesting place, interesting history, interesting facts, interesting debate, interesting book.
hard-working - hard-working person/man/woman, hard-working doctor, hard-working employees, hard-working student, have a hard-working character.