In answer to your question, MD, yes - been living with one my whole life. He does odd things occasionally, but mostly I think he is just there to watch over me. In the past I have seen him, been kissed and touched by him, had him play pranks on me and others in the house (he particularly likes to hide watches for some reason, but he usually brings them back when you ask), and on one occasion make some unwelcome visitors feel ill! One night my sister was talking about him, saying she didn't believe, that she thought it was a family in-joke - so he made the light above the table we were sitting at rotate...
I've also had a couple of really weird experiences in other places - more threatening than my friendly spook.
Have a look on the net for ghost photos - there are literally thousands out there. A lot are probably dust/smoke/breath mist and deliberate fakes, but there are also a couple of sites that show how to differentiate. Intersting stuff. Beware the camera strap!
Have fun on your ghost-hunting trip - I envy you!! Definitely something I'll do one day.
Cheers
Jewel