I have ESO but I haven't played it much, mainly since I hate lag and there are no Australian servers for MMOs. I also hate how the classes work and how much it deviates from the single player games, it really shoehorns you into using a certain playstyle for a specified race, class or weapon. Having a few classes like "Dragon knight" and "shadow archer" or whatever they are called ignores what's good about the single player games. For example, in the single player games, there are hundreds of combinations of the skills, races and equipment that you can use to create your own unique playstyles. You could play as a monk who plays unarmoured and supplements hand to hand skills with restoration and alteration, or you could play as a mage archer who uses conjuration and illusion to distract your enemies while you sneak in the background shooting arrows, and so on. In ESO, all that is lost in favour of having a few contrived class archetypes - if you're a certain race you must use x weapon or you won't get any benefits, different types of armour give arbitrary bonuses to different playstyles, et cetera.
Rather, I've been playing TESIII: Morrowind.