I've dabbled in various card games over the years. I've used other people's decks and played a little bit of Magic the Gathering and the Pokemon card game. I got seriously into the Game of Thrones Living Card game for about a year. It helped that one of my friends owned every single card from that game. I also picked up a starter kit for the Netrunner Living Card Game and loved the ideas in it, I just didn't have anyone to play it with consistently.
So that's where I'm coming from. A little of bit CCG and LCG knowledge paired with one year of fairly intense play (and a tournament) for the Game of Thrones LCG.
Why does Hearthstone appeal to me so much? Well, it's the first digital card game created by a proven AAA video game design company. I know that it will be super polished. That's what Blizzard does. A simple look at the UI already shows how much effort they're putting into this game.
They're doing things you can't do with a physical card game. Persistent health is a really cool concept that doesn't translate to physical cards. Digitally, you can easily add and subtract health to a card and have it appear directly on the card. Not only that, but you can send a creature back to an opponent's hand with a negative effect still on it. They're just scratching the surface of the unique things a digital card game offers, but I can't wait to see more.
It looks like a solid CCG. From what I've seen it looks like a well developed game. The creators obviously know their stuff when it comes to card games and it shows.
I can't wait to get my hands on Hearthstone. It's always best to get in on the ground floor of a CCG or LCG. It's when everyone else is still learning and their isn't a huge backlog of cards to pick up. If you're interested in CCGs this will be one you should try out at launch.
If I get a beta key I'll definitely be writing more about it.