I used to play WoW, but Hearthstone is just straight up retarded... Look at the spelling of the name. Nahhhhhhh, I'll stik to my good ol' b-ball, niggs
Obviously you don't know what a hearth is.
I play it but I mostly just dick around with stupid decks.
Come play with me sometime nub I'll give you your first spanking free of charge.
I suggest you do the tutorials and fight bots until you unlock the basic set for your class of choice, otherwise in a real game people will just own you. Though you've already seen videos of Hearthstone so I imagine you know what to expect.
Yeah I played it right up until I found out there's fucking awful restrictions on how much you can acquire each day in in-game currency. It would take years to get a full set of all the cards.
Right now I play Infinity Wars, completely free, no retarded limits, better cards and way more strategy. Oh, and did I mention it uses the Source engine?
Another really awesome TCG to look out for (Pay once and for later expansions, like Guild Wars) is Faëria. It's fairly dead right now because the devs are working on building the game with Unity instead of flash.