My major issue is that I have no idea where to begin when I hit the max level. Everything seems so overwhelming and there's no in-game direction about what to do.
I leveled to max on my Mesmer and now I'm rerolling Thief because I have no clue what to do.
Here's what I did:
Once I hit 80, I started working on getting optimum gear. This involved crafting some pieces and earning other pieces through dungeon runs. At first, my gear was a hodge podge of what I could get, but I had a visual look in mind and stats for my build in mind that ended up being a mix of crafted items, whispers armor, and Crucible of Eternity armor. I also wanted a cool sword and Greatsword, so I got the Ghostly Sword from AC and crafted a Mystic Claymore.
After that I did a lot of dungeon runs. I hadn't done many of the dungeons leveling up, so it was all content I hadn't seen yet. I mostly did these dungeons just to see the content.
When I got a little tired of dungeons, I did some WvWvW. I got obsessed with that for a month or so, and then I finally decided to check out Orr. Yeah, I had played for two or three months and barely touched the final zones. I remember getting some GAF guild people to help open up the temple of Lyssa. I think I may have still needed certain stats that Lyssa had.
I also needed to do Orr to gather materials for crafting and max out both of my crafting trades.
Here and there I would work towards a weapon skin or item I wanted. I think this may have been where I was taking a semi-break to play some single player games. I was doing a lot of Adventure and indie games here and there.
Then when I started playing more heavily again I decided to finish off my personal story. I stopped somewhere in the 50-60s level range of the story, so I had a lot to do.
I also started working on a second set of gear for a different visual look and slightly different stats for another build. I have three sets of exotic gear now, with a glass cannon set, higher survival/magic find set and a condition damage set.
You don't have to do things in the order I did them. Some people focus on personal story. Some people aim straight for Legendaries or World Completion. I haven't even begun on World Completion focus, even though I'm at 1300+ hours played.