Ok, time to go into this:
The Assassin's Creed Series (with the exception of 4). I'll admit I've only played 1, 2 and 4, but god were 1 and 2 bad (and the best part of 4 was when it wasn't trying to be an Assassin's creed game). The gameplay was boring and repetitive, the worlds are not great to explore, and the story was disappointing and a huge waste of the potential of the whole 'relive the genetic memories' thing. I was surprised people raved about 1, and even more surprised that the series is cranking out disapointing sequels annually. Just not worth my time.
Dragon Age: Origins: I won't say I hate this game, but I'll definitely knock it down a few pegs. The world building is good, but the story is pretty dull. There are some interesting characters, but most of them are quite shallow. The plot is actually pretty predictable, and the gameplay was not as deep as fans of the series like to think it is. To be honest, my favourite part of the game was the Fade, and for some reason everybody who isn't me hates that segment.
Pokemon X and Y: Honestly, the more I think about it the more I realize that X and Y are the weakest entries to the Pokemon series. Yeah, the designs are better than some previous generations, but that's really all you can say. The progression through the map feels painful, and there is no real post-game to look forward to after the elite 4. Also, the story was bad even by Pokemon's standards and completely killed any goodwill I had built from the surprisingly good storyline from B/W & B2/W2. And Mega Evolutions were poorly implemented as a whole in my opinion. I'll admit they aren't an outright bad idea, but for the most part they are just a huge stats-boost to pokemon that didn't need it. The concept of Mega Evolution is solid, but I feel that it is best when used to go back and make an old, underrated pokemon see new light with new build-around utility rather than just give more stats to already popular pokemon (like Blaziken).
Heroes of the Storm: I've gone on about this game before, but unlike other MOBAs where I at least have fun playing them, after I left Heroes I realized that I hadn't been enjoying my time on the game. The gameplay is shallow even compared to Smite or LoL, the shared XP mechanic makes the game more snowbally and, in my opinion, hurts comebacks and increases the feeling of hopelessness when you are doing well but your teammates poorly. It has some potential, but just squanders it.
Minecraft: I don't know what it is about Minecraft but I can't stand it. And I'm normally a guy who likes a sandbox. I play games like Sim City and Roller Coaster Tycoon. I have a CAD design suite that I use because I get bored. I still play with Lego from time to time. I like to build things, but I find Minecraft so unrewarding and unexciting that I just feel no desire to play it.