I love Trick Room. The fact that all I have to do is drop my speed and focus on HP and its Attacking stat makes it so viable to me. It doesn't help that I'm one of those people that like to only use Pokemon they like, and a lot of my favorite Pokemon are quite slow.
So now, they're slow, and bulky.
And then, I prefer Doubles to Singles. I used to hate Double Battles, but then I started playing in the VGC Style and I got hooked. I have two Pokemon out, and they help each other. It's a whole new level of strategizing, and I personally enjoy it much more.
I also prefer to try and use Pokemon/strategies that aren't so common. With Pokemon, that's not so hard. I like a lot of Pokemon, so I have a large pool to choose from. But when it comes to strategies, I'm little more hardpressed trying to stay unpredictable. But I try.