A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.
If this were the best of all possible worlds, I could come to the phone right now, but I can't, so if you could leave your name and number, I'd appreciate it.

Custom voicemail greetings are essential. If you don’t have one, it makes your business look unprofessional and a little robotic. Be sure to include something that people will want to hear when they’re calling your business. Inspirational voicemail greetings mean a lot ot your callers, it lets them know you care. When it comes to business, voicemail is the most important form of communication.
When you leave a voicemail do not use your full name because that immediately raises a red flat that you are a salesperson making a cold call. Instead, say your first name only followed by your company name. This will make your customer feel that you are much more familiar with each other than you really are. Saying your last name would defeat the whole purpose of demonstrating familiarity.