What for you makes ESO great? What features/content big or small, are you glad they worked on?
What has ESO brought to the table for the TES franchise?
For me little things like seeing my characters hands in 1st person interact with things.
Being able to pick up items lying around
Seeing other players going through there bags and journals, maps etc.
Lore books
The huge variety of mounts
The best pvp I have experienced (apart from the not great class balance)
Guild tabards and most of all... bringing the full TES experience and the whole continent of Tamriel and hopefully more into an online game.
Awesome stuff : )