After wanting to attend HHN since Islands of Fear, I won a sweepstakes to HHN in 2012. Gone every year since. While I agree 2012 is the weakest of the years I've attended, I disagree with all the houses being crappy IPs.
The two originals, Dead End and Gothic, were great houses. The latter still being one of my favorites. Penn and Teller was very creative and felt like an original house; the 3D worked against it. House of Horrors was alright. I'd say the true duds were Alice Cooper, Silent Hill, and The Walking Dead.