As said above by some expert domainer. Short domain always work great for you. If we think practically none is going to write a domain name that contain more than 8-10 characters. Everyone likes to see the site open with a shorter characters that is what I feel.
Also there is some exception, I have experienced that if you know such a popular domain name i.e michaeljackson.com, barakobamacountry.com, worldgreattrips.com, etc...could be the difference.