Torn. Not to get religious, but I'm an atheist, yet I'm fairly positive we had an "energy" in my home a few years ago. Doors opening untouched, items moving on the counter, and sounds coming from rooms when nobody was home but me. Obviously if I don't believe in higher powers I shouldn't believe in ghosts but it was undeniable.
It was enough to talk to my landlord and she confirmed she had issues in the past.