I am totally bored/frustrated of Ranked play...always encountering the same decks, and if you play anything but the most competitive decks you make no progress, couple with the fact that there is really no incentive or rewards other than the card back, I don't see the point anymore.
What I do is do my dailies in Casual and when I have enough gold, do some Arena.
The thing with Casual is that you see much more variety in decks, you still see the top ranked decks as people are testing them and learning how to play them, but you still see more variety.
When I play Casual, I generally tend to play somewhat less efficient decks, that are less consistent but in my opinion a bit more fun to play...or I do some really gimmick decks that are totally inconsistant but when you win, it's just spectacular.
My card of choice right now is Kelthuzad...trying to find ridiculous ways to abuse him.
I was fiddling with a mage deck with Kelthuzad, Echo of Medhiv, Sylavnas, Cairne, Sludge Belcher...basically ended up running out of room on the board for Kelthuzad effect to occur as there was no room to bring back the card that died that turn since they had spawn new stuff, or stolen cards when they died.
It was funny.
The game is so much more fun, when people don't play it for the win at all cost mentality and are willing to experiment.