The subject of "End-Game" is a polarising one in the GW2 community at the moment. Part of the population seems to say that with only a handful of high-level zones and only so many times you can run the same eight dungeons before you start tearing your hair out, the GW2 end game is pathetically lacking. Another part is arguing that the sidekicking system turns the whole game into an end-game, potentially, and with the numerous paths available in each dungeon - you have far more than eight dungeons-worth of content available.
I try to stay out. I've only really just hit level 80 on my first character within the past week, and only just reached the final personal story mission (it is rather satisfying to see "Kill the Elder Dragon Zaitan" as my quest objective). I've never done explorable mode on any of the dungeons, and I don't have a single exotic item (except the spear I just got from exploring the whole of the Cursed Shore). So I'm not too worried about exhausting the end-game content quite yet.
However, in terms of long term goals, rather than "End-Game" content, for me, the Legendary Weapon saga seems to be the pinnacle of what I could hope to achieve in the coming years. Requiring vast amounts of wealth, karma, skill points, PvP killing and sheer dumb luck, the Legendary Weapons are exactly what I would hope they would be - reserved only for those who put the time and effort into achieving them.
Right now, I'm just looking at accumulating the wealth to craft myself a set of exotic armour (hit level400 armoursmithing last week). The insignias alone will require 30 large scales (roughly 1.5s each - 45s), 30 ectos (15s each - 4.5g), 30 Gossamer (1.5s each for scraps, x2 = 90s), so we're looking about... ALL of my money and that's without the Orichalcum, Gossamer Scraps and Gossamer Thread required to put together the actual armour components.
I've just hit 10g for the first time, so I'm going to look to accumulate the required coin by exploring and farming high leveled areas. Hoping that I can gather some of the above ingredients for myself while building up my capital and hope that the two streams meet somewhere in the middle.
So, end-game isn't really a worry for me at the moment. And anyway, I can't bring myself to enter Arah to complete the final mission alongside the newly reunited Destiny's Edge without first completing each of the story missions in the preceding dungeons (Still missing Sorrow's Furnace, Citadel of Flame, Honour of the Waves and Crucible of Eternity). In my eyes DE won't have properly reformed until I've FORCED them to do so.
"ALRIGHT NOW KISS!"