I started my char planning to play solo most of the time, if not all the time, and started that way, now i have been finding some time to play in groups so i have tried, my experience so far hasnt been great i should say.
So far, i have found two kind of groups, the first kind are clueless, and most of the time they wont listen, one example, we were doing deleras part 2, it was my first time but i knew about the lever, the party got to the lever, i told them what to do, they didnt listened and started backtracking all the way to the entrance of the quest, even when i was telling them to come back, i had to wait like 20 minutes for the party to return and listen.
The second kind of groups, they have 3 or more experienced players, that want to do the quest as fast as possible, i dont have problems with those kind of groups if i know already the quest, cause i can zerg with them, but if i dont know the quest, i end chasing the group all the time, and they usually dont stop to explain anything, even when before joining the group i sent a tell saying that i didnt knew the quest, they invited me, but then wont ever answer a question.
Usually in those groups, i end screwing the chain quest givers cause i dont want to delay the others. Happened to me with Co6, and with VON flagging, i end getting good xp, the favor, but usually miss the end reward or the flagging, and in general dont enjoy the quests cause its a chase the party for me, in VoNn is even more problematic cause the party sometimes split and i dont know who to chase :P
I know that my experiences are limited and dont have to be the norm, but so far i found solo playing much more rewarding than grouping.
When i m looking for groups i usually dont have too many options to chose for my level, so i think most groups fall in that category, though i admit the possibility that i had some bad luck.
Again, i dont have problem with a group of new players, if they are willing to learn togheter, and listen to some small advices somoene could give, and i dont have problem with zergers if they stop to explain something when you ask. But so far i havent had any luck with those 2 kind of groups.