I'm not really into PvP so I'd like to see a continuation of the story through PvE content. At the risk of getting flamed I like to solo so I'd love more content to just continue on from where it stops currently, but with something to feel I'm achieving with my character in terms of abilities/loot...
...So I guess that translates into a raised level cap so I can just carry on leveling, as it's the journey rather than end game that I enjoy. I'm not really that big on repeating content so I can get more gear .. just to repeat more content.
If the Devs can come up with an alternative way to keep working through continued story with a feeling of character growth, that's not leveling, that would be fine too.
Please don't start shouting at me that I should just go and play a single player game - I do play them - but I like MMOs too and don't "expect" them to cater for my playstyle in any way. I like having other people around me in the game world, even if I don't really choose to interact with them. I like the fact that if I get enough confidence in my abilities to play the game I could team up with others to do the content I haven't covered on my own. I like that there will be new stuff added to the game over time, some of which I may enjoy - but that's off topic really - sorry.
The OP asked what we'd like to see after 50 so put me down for more story content to work through whilst still feeling I am progressing my character.