I'm looking forward to seeing the all of Tamriel, for sure. My first TES experience was Oblivion, so I haven't seen any of the provinces other than Cyrodil and Skyrim. I can't wait to see how those provinces looked back in the day as well.
I'm not one for PvP. I usually stick to PvE and lore rather than worrying myself with the whole PvP scenario. But I am really excited for how PvP will work in TESO since there is strategy and immense teamwork involved. I think it will be an awesome experience that brings the community together in an all out struggle for Cyrodil. I can't wait to see what kind of rivalries brew up in that experience as well. All in all, the PvP system sounds thrilling to me.
There's also the lore that I'm very interested in, so I hope TESO employs a lot of it in the game. I hope that TESO sticks to the lore, as well, and doesn't just blow it off to make the game more of the modern mold of MMO's. It seems like that won't be an issue though, seeing that they have a more in-depth quest system and not just hubs of quests where you go out and kill X number of enemies to collect Y number of materials. That, in my opinion, is very vital so it doesn't get boring.