Originally Posted by DArtagnan
Have you tried getting any of your friends to join you? Also, you don't actually have to play cooperative with anyone to enjoy some of the MP aspects, like the AH system.
For me, it's enough to know that there are people playing the same game in the same world - and that you can interact with them to gain advantages and share experiences. Even the most isolated hermit in the real world is probably going to prefer that other people exist somewhere.