dont ever see any parties going to sunflower or ninja.. whats going on?

1. It's a new game, not many high level players yet.
2. I'm not sure where you're from but here the weather is getting nice and a couple of cold ones on a patio somewhere sounds better than MMO =)

Unless the drop is needed for quest from the boss many people will just ignore it.  The effort in killing some of the boss is not worth trip/time spent.  Check what you need to do and compare it to the reward for finishing it.