I think a general build order applies, because no matter the class, you are working a combination of power/crit/toughness/healing/vit/whatever.
If you are taking hits, part of your build needs be vitality/toughness/healing. This applies to tanks in PVE, and everyone in spvp or wvw.
PVE, for the straight, quickest killing... crit/power rules. You gotta kite when you get 4+ mobs, but you burn them down quick. Condition dmg is nice in the 1500+ range, but slow overall compared to crit/power (over the course of an hour's time, the crit/power build will out-farm the condition build).
PVP, condition damage can rule or be totally useless. It all depends on your opponents build - if they are all power/crit, you can destroy them with conditions; if they are defensive with condition removal, you can be the easy kill for them.
I run completely different builds for pve, pvp, and wvw. PVE I focus on power/crit for fast killing. PVP I focus heavily on survival (vit/toughness/healing). WvW I focus on aoe and healing. Levelling? Power/crit build ftw (with any runspeed traits).