Many businesses try to save money by selecting an amateur voice actor from inside the company to provide a recording. The trouble with this is that: The “actor” is typically an amateur with no voiceover experience. The company doesn’t have personnel with directing voiceover. The “actor’s” goal is to finish quickly and get back to work, not make the best-quality recording.
The Serial Position Effect states that the human brain is most adept at recalling the first and last items in a series. For sales reps, this psychological phenomenon means that your voicemails are much more likely to be remembered if they're listened to at the beginning or the end of the day.

Remember, your message is a reflection of you. Keep it short, professional and ALWAYS return messages.
The simple truth is that you need to be more aware of what you’re leaving for other people to hear. Sure, this doesn’t always register as a priority for users, but it’s never too late to reassess your greeting. a. Reading/Speaking in the Imperfect Tone: Tone is absolutely everything. Users don’t want to come off as being too nice, as it sounds insincere, or being too terse, as it can be interpreted as being rude. That being said, striking the right balance is absolutely essential. Your greeting exists as its own entity, and therefore, it should NOT rely on callers’ familiarity with you. Instead, it needs to appeal to the masses. As such, your inflection, i.e. the way you state your name and directions, needs to be both welcoming and firm. b. Injecting Humor & Insincerity: While humor/light heartedness can be welcoming, it can also convey a sense of informality, insincerity, and ultimately unprofessionalism. Why, because you’re not there to lend your humor or to contextualize. Instead, you’re assuming the caller has a working knowledge of your personality to ground the message. Though this might not sound like it’s all that terrible—it can be detrimental. As stated above, one should NEVER rely on a caller’s familiarity with you. Instead, aim to appeal to the masses. Humor is ultimately subjective, meaning not everyone has the same tastes; therefore, someone is bound to be turned off by a quirky or off-color remark. While implementing a light-hearted or even tongue and cheek tone can work, it’s just a really bad idea.