Over pricing is a trap that many neophyte home sellers fall into, and it is by far the greatest single factors for prolonging the time a listing spends on the market.
What these sellers do not comprehend is that over pricing a home not only allows it to stay unsold for prolonged periods of time, but also that it drives buyers to competing homes. By over pricing a residential property, you are helping the very homes that you are in competition with for your buyers' dollars.
Emotion is a powerful motivator among sellers in determining what they expect to derive from the sale of their home. Of course this is your home and likely has been for many years. You have made considerable improvements and modifications to it to suit your preferences and requirements, and have invested heavily into maintenance and repairs. You may feel that you are justified in asking the price you have in mind because to you the house is worth that much.