Even after a few beta-sessions I'm still firmly on the fence about TESO. The game is pretty, the combat is okay enough, and it's an OCD'ers dream in terms of collecting achievements. Plus, it conveys the world well enough to actually give you a feeling for where you are.
That being said, it is, to me, just OK. Not great, not horrible, but just...OK. It's something that I could spend €15 a month on for a while, but I'm not rabid about it. Maybe I've just become extremely jaded towards games over the far too many years I've spent in front of a computer-screen, but I find it very hard to get excited over games anymore.
As it stands now, the deciding factor whether or not I pick the game up will be how many of my friends go there. If most/all of them go there, then I'll most likely follow. Even if that means leaving AoC behind.