Our office recently started using Skype for instant messaging, and connected it with our Mailing service as well - with this, we've been given the ability to add our own avatar, which will show up on Skype and in email.
I would like to have my avatar be of a fictional character - there's nothing controversial about this character, but I'm worried that my co-workers might consider it unprofessional if it's a more obscure character from a more modern video game or cartoon. For reference, I plan on using a character from "Ghost Trick: Phantom Detective".
These correspondences are all within our department only, but could potentially include HR, supervisors, and occasionally the people whose application I support.
What type of 'appropriateness' protocol should I follow when selecting my user avatar?