Listen guys. The problem, to me, seems to be in the way the game is currently designed and the direction the gameplay took.
In order for the game to encourage partying with other people for things like bossing or PQing, which are probably the most enjoyable activities you can do in the game, these need to be modified in such way that would make it worth it for players to recruit for a party for these purposes.
Currently, you can enter a boss alone, solo it alone in a matter of minutes if your attack range's high enough - and never even think for one second, about looking for a party with other players for the same thing.
Same for PQ's, except I believe you can't enter them alone - and because almost no one is there to join you, you just skip PQ's and never do them now. Which really sucks.
Even if changes are made to these things, there needs to be increased player awareness of it - to encourage partying with others, otherwise no one will care about it.
Have anyone thought of a good solution to this problem? Because this is probably the biggest, or atleast one of the biggest problems in the game right now. Atleast for me, and probably for a large percentage of the game population.