My fav place as of yet is the Asteroid Belt/The Reef. We get an awesome glipse of this (Bird's bro and I were running through it again yesterday) in the storyline mission, and I've always heard speculation that Bungie would be expanding into this realm in one of the future DLCs. It's such a unique area (from the brief glipses of it; especially in orbit, just after completing either of the Queen's cut scenes) that I'm really hopeful that they do develop more there. I'm fairly impartial to the rest. At this point, each little area has its uses, so that's all I'm ever interested in (bounty completions, glimmer farms, engram farms, etc), and don't really venture out otherwise. A lot of people I know will form their raids from parties, and then all join fireteam when they have 6, so that people can keep running around to do things while it forms. I'm not really one of them though, because if I'm LFG, it's because I've already completed everything else that I'm interested in doing that week. Therefore, I end up seeing a lot of orbit and messing about in forums (or IRL stuff like getting a beer, or other bio stuff). (Wow, sorry that got so long. I kinda suck at expressing my thoughts in brief one-liners.)