I've been around off and on since beta but have yet to find a guild that actually interacts with each other on a regular basis. I do mostly pve content (dungeons, events, etc) but I would also want to try my hand at guild missions and maybe even WvW. I have played MMOs for many years, mostly guild wars and city of heroes (beginning to end!) and it's weird playing solo over 95% of the time. I also like to chat it up so ventrilo, skype, whatever you use I probably already have.