Give consideration to "who" the message is from. A brand? A person? A person working for a brand? If it is from a person, is the person's contact information shared? If someone tries to reply to a message, will the "from:" say "no-reply"? What happens if the person leaves the company?
Personalization also means knowing your subscribers so well that your messages feel personal.
TIP: Instead of thinking about writing an email to your list, think about one person you know well on that list. Write your message for that one individual. Focusing on a person instead of a nebulous group may help.