While I enjoy grouping, there are a few reasons why I find it difficult in PG to do so.

1. My game play is often subject to frequent interruption, and as such I make a poor grouper much of the time. The devs could fix this by sending me a check for $5 mil USD so I wouldn't have other RL obligations.

2. With the current UI, grouping kind of feels like 'soloing in packs.' Targeting others isn't terribly easy, and agro management is challenging--in a group that runs a lot together this might be less of an issue.

3. I dislike group looting. Elites are great--I like that everyone gets a shot at some loots. But normal mobs are just a PITA; your normal group of 4ish will pull 6-8 and AoE them down, and then your left hunting for purple speckles trying to figure out which are yours. If you are a skinner/butcher then you are competing for with your own party. Perhaps a loot system that randomly or systematically distributed the loot would be better, I dunno.

For the above reasons, I solo a lot. I find that my xp/hour and loot/hour tends to be better soloing than with a group, and honestly, it's often just easier. That said, I would like to group more, especially when fighting elites.

$.02

(First post! Love this game, so good now, can't wait to see where it goes.)