I think most people would agree that anything over 15 characters is fairly long.
I try not to buy a lot of long names however if I find a phrase that would be identical to what people were search... then I do register them.
I have had some offers on…
MyLandIsForSale.com
PropertyOfChicago.com
SolarPowerYourHome.com
PhilippineElection.com
Which happen to be some of the longest names I own.
Out of all 8000 names I own, I have never had a name get natural type in traffic like PhilippineElection.com during their recent elections. Surprisingly enough most of the traffic came from the USA, from some of the 10 million American/Filipino’s who wanted to view the results in their homeland.