I actually like to do the same with my voicemail. It's nice to change it up from time to time and put more enthusiasm into your voice, in many instances, initial introduction to you.
Dan - yes indeed Dan! Yes indeed.
Faina - I knew a VP once that would change her VM greeting every morning! She would update it with the current date and if she would be out of the office that day, etc....
Good Morning Sam, great input, the time is here to make changes.