I think its a matter of personal choice. It can be sweet and short if its established and has some content to it. Its all about how you plan to work with it. Other than that, its worth no more than registration fee.
There are literally thousands of domain names with host in them. None of them are unique enough to be worth anything unless they have already been active and you have a verifiable number of daily unique hits.
I know this may seem a stupid question however I am curious about domain values. So if the domain isn't very "rare" however has a nice amount of daily unique visitors it bumps up the price?