I'm always happy to see them with new hair colours and styles because it always signals the beginning of a new era. I'm not really picky with the style or colour. I like all of them
You can send to their SM Entertainement company. Here's the address : SM Entertainment 521 APGUJEONG-DONG, GANGNAM-GU, SEOUL.or korean --> 서울시 강남구 압구정2동 521