Well, I just hit 80 on my Warrior in the middle of a WvWvW match. I started out doing 100% zone completions and story with a bit of WvWvW mixed in. After 50, I did more WvWvW than PvE, so I ended up skipping a lot of zones until I went to the Orr 70+ areas and did a bunch of the roaming dynamic events there. I barely did any crafting, maybe only half a level. I didn't have enough resources or space and the broken Trading Post didn't help.
Now I have to figure out the basic starter gear for 80. I have some Karma saved up since i didn't really spend it on gear along the way. I probably won't go back and complete the mid-level zones I missed, since I have 5 alts to play and I'd like to see new stuff the next time around.
I will go back and finish the story and probably complete the highest level areas to see what's out there. I'm not much of a traditional endgame raider, so I might check out some of the instances, but I'll probably spend more time on WvWvW, alts and crafting.
I hope they fix the Trading Post soon, because that's a good part of the game that I enjoy that isn't working. I did loose a bunch of stuff I put on during one of the earlier Trading Post tests when there was limited access. I hope they can restore at least some of what was lost. There are tons of little bugs and glitches in all areas of the game, but the broken Trading Post is probably the most disappointing part of the launch.
Looking forward to playing my next alt, but it will be tough to choose which one. Probably Mesmer, Ranger or Engineer. I may try them all out in WvWvW before I decide.