If someone wants to play solo then thats ok and good for them, myself i'll be playing solo most of the time until i get to know the game and some people, made a couple of aquaintances when i played beta..highly doubt i'll see them again but, for some things you just HAVE to group up to do it.
Playing with the right people can be fun too though, just have to make sure that the rules or guidelines in group are sorted out first so people dont take all the drops when they dont even need them