I, too, am a sceptic. A lady I work with has a great story though about the first house she bought with her first husband-to-be. They were renovating it before moving in, and twice when she was there alone working in the toilet/bathroom -- she glanced up to the mirror and saw a strange man in a flat cap looking back at her. Each time, she immediately fled away from the house.
Worried about telling her fiance - because he'd think she was a loony, she continued to fret over moving into the house, until one night she overheard her fiance having a quiet conversation with someone in the local pub while they were out for the night. He was telling the other person - 'Don't tell my (fiancee') X, but our house is haunted.'
Upon hearing it, she confronted him to find he'd also been seeing similar occurences. They arranged to have a COE priest bless the house before they moved in, and didn't have any further trouble. The local story was that an old Yorkshire geezer owned & lived in the house for a long time, dying there, and it sat vacant for awhile until they set out to buy it.