The following is something I typed as a response to
this thread, which got locked as I was typing. I still felt like it needed to be said somewhere, so here it is.
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There is no endgame, there is all the endgame, there is some endgame. Any of these can fit depending on what you think "endgame" is.
If you're schooled into thinking "endgame" is an activity that you're only able to do at max level, which should be the core of an MMO and differ greatly from what you've already done, GW2 has no endgame.
If you're of the mindset that "endgame" is something that you
can do at max level, that provides somewhat of a challenge and gives you relevant rewards for your character, the entire game is endgame, starting from level 2. I personally belong in this group, and I frequently receive hatred for it.
If you do research on what the game is and isn't before you buy the game, and go into the game with your mind already made up that "when I get to level 80, I'll be wanting to do this activity", then the game has
some endgame. The activity in question is irrelevant. It could be exploring, it could be assembling the coolest looking outfit you can think of, it could be finishing every jumping puzzle, it could be dominating PvP, it could be helping new players. Some of these have a clear and definite goal, others are practically endless.
Bottom line is, "there is no endgame" is just as wrong as "all the game is endgame" (which is why I love countering the first with the second, because nobody is able to prove or disprove either). Just find out for yourself what you want from the game and go from there.