Who are you going to let me experience when you come back to work? Are you coming to work thinking about what is this going to be like? How boring or exciting is this going to be?
This is your moment to re-invent yourself. The energy that you always wanted in your office is up to you, not your colleagues or your boss. What you bring to the office on your first day is what you leave for everyone else to experience on their first day and last day at the job.