sweet — having the taste or flavor characteristic of sugar, honey, etc.
agreeable — If something is agreeable, it is pleasant and you enjoy it.
blah — You use blah, blah, blah to refer to something that is said or written without giving the actual words, because you think that they are boring or unimportant.
bland — If you describe someone or something as bland, you mean that they are rather dull and unexciting.
calm — A calm person does not show or feel any worry, anger, or excitement.