Aggro V Aggro is the same as Control V Control. You're still using similarly valued cards to achieve a similar goal. Using information of the meta to best use the cards in your hand and hopefully outplay your opponent.
RNG is heavy in both games as well. the coin flip and starting hand/mulligan for aggro, and RNG value generators and other effects in control matchups.
I enjoy all of Hearthstone, and I generally play tier 4 and below decks because I play to have what I consider fun and use uncommon cards to unexpectedly beat opponents or pull off crazy board creating turns. (i like Necrium Apothecary and Anubisath Warbringer in Rogue right now)
Just like in a shooting game, do you like to bring a shotgun and shoot your shot, die and come back guns blazing? maybe you like to use a sniper and be unseen, trying to take out the shotgun monkeys before they even see you.
Driving, relationships, entertainment . . . it's all a matter of preference and nothing any one person says can change what tastes you've acquired over the years.
2
Before people get too down on this card, remember that Odd mage worked as a deck, for effectively the same hero power. I think it's going to be a pretty decent to good deck, especially if there are more good shadow spells.