I think your problem is you don't expose yourself to new things very much, therefore nothing is new to you and you don't laugh often.
For example, that clip is at least a year old, but you just found it and it made you chuckle. Just think of all the thousands of other things out there you think you're obviously going to hate and actually like!
Maybe, but my first thought is, how much crap do I have to wade through to get the good stuff. That's why I count on ATOT to bring the freshest, highest quality yuks on the interwebz.
For example, even if I go to a site that I know for a fact has things I like, let's say I Can Haz Cheesburger for example. I know that most of the pics and captions are going to be stupid, not funny and probably both.
I think people would pay good money to have a funny pic/gif feed tailored to their sense of humor. But learning algorithms that can even comprehend the idea of humor are probably still a few years away.