I'm playing this. (I try most MMOs, I can't help it). I'll be on Daggerfall Covenant on the US megaserver.
It doesn't have the freedom of a typical Elder Scrolls game, but it has a familiarity about it. I like that they tried to keep the UI to a minimum and really went for reticle targetting instead of tab-targetting. (You can still tab-target, but you still have to aim your attacks if you want them to hit.) It's probably the same as every other MMO I like after playing the beta, but I'm optimistic that ESO is changing the standard MMO formula enough that it feels fresh. Also the crafting is strangely interesting to me, where I've never been into crafting in MMOs.
Also, the subscription fee... I think I prefer it that way. For people who have never paid a subscription to play a game, I can see how it would seem offensive. It's a service that's not sustainable without continuing income though. Free-to-play and buy-to-play MMOs have started to really get on my nerves though, and I think I'd rather just pay $15 a month. With F2P MMOs you end up with one of two scenarios:
MMOs built as free to play: You're limited on bag space, bank space, crafting resources, and tons of other things, because you're expected to buy into them with real money. In Neverwinter to make the best crafted gear you needed tools and NPC helpers that were only available in the item shop. In Allods Online you had to use item shop consumables to craft with if you wanted to keep your gear current, and then it took a MONTH for you to make an airship so you could participate in the best part of PvP, and could speed that up with real money. If you don't spend money, you end up with a crippled game experience. yes, even in Guild Wars 2. Trying to gear out at endgame in GW2 is a loooooong grind, and can be mostly bypassed with real money by trading gems for gold and buying what you need off the auction house.
MMOs that transition from subsription to free to play: Because the microtransactions weren't built into the game from the beginning, they have to find other things to lock away behind microtransactions. SWTOR locked away action bars (you could only have one if you didn't buy more). Most limit the number of dungeons and PvP battlegrounds you can play per day/week, and won't let you do raids at all. They build as many microtransactions into the game as they can, and then tell you that if you subscribe for $15 a month you can remove all the paywalls (usually it's not all, but most).