Although I have turned to Magic for the majority of my gaming, I still occasionally boot up Hearthstone. It did get me back into the card game mindset, afterall.
I am sure the competitive level is actually quite competitive, but the random parts of the game turn me off enough that I don't feel like dedicating myself to the game like I do with Magic. I still like the Solo Adventures quite a bit.
Figuring out what card combinations are best to take out these clearly cheating bosses (I mean, the game says so) is quite the challenge. It can be frustrating due to the randomness but so far I have completed most of them. Why? The reward for beating the boss with each class isn't exactly exciting, but I feel motivated to do it.
Blizzard did a fine job with this, even though it is frustrating, it is sticky. I want to finish this.