If you don’t know it by now, you might never know. Voicemail greetings are incredibly important to users. It conveys identity, character, and image to callers. In an increasingly digital world, where business is conducted online and over the phone, phone presence is increasingly important. As such, your greeting is a crucial part of the platform. While there are a number of obstacles to be aware of, utilized properly, voicemail greetings can be incredibly helpful and beneficial; therefore, its in users best interest to invest themselves in creating a quality recording.
Apart from gaining a good impression of you, a clear and professional voicemail greeting is essential for negating any possible concerns the caller may have that you are the correct person to speak to, and will give them the information they need to leave you an effective message in return.

@Fa5t3r - I would try a wide range of different tones when recording and play them back to see what goes over the best and what projects the image you want people to hear. Remember that some people may be going to hear this message over and over again depending on how often they have to call you so you want it to be very pleasant and not at all irritating.
Smile. When recording your greeting, smiling will put some enthusiasm in your voice. Your callers will pick up on it and feel more comfortable when leaving you a message.