I've read in several of the posts that the Single player experience is recommended over playing more than one character. I have played through 2 times now both on multiplayer mode. Are the dialogs/quests actually different for the single player game? Or, is it simply a matter of less NPCs = less dialog = less fun? I am thinking of playing it over again with differenct characters, and if the single player experience is really that different compared to playing 2 or 3 self created characters, I might give it a shot, but I rather enjoy building up MY characters as opposed to the weak sauce NPCs provided. I appreciate any insight you can provide. Also if you can give me some examples of things that can ONLY be done in a single player game, it will help me out alot.

Nearly all the NPCs have quest related to them, You also miss out on some of the Plot without the NPCs in your party and you also miss out a lot of realy funny dialog like Jans stories. You should try it as you are missing out on quite a bit of the game.