There are lots of additional ways you could extend Hack Skellington.  Here are some of the things I want to try:

• Connecting a microphone and having Hack randomly insert himself into the conversation with AI generated responses (the speech module can enable this)
• When a specific person is detected, freak them out by using their name when speaking (the facial-detection module can be configured to do this)
• Connect to a solar charging battery so Hack can be awake 24/7

Let me know if you build your own Hack and where you take the project!