What got me into them? Youtube. But I dont know WHY. It just started showing me videos of cubes one day, and I was intrigued. So I went and bought a normal cube from the local Walmart and gave it a try.
It's not quite as crazy as it might look. As I said, the original Rubik's Cube presents no challenge anymore. But that's not because I achieved some mystical level of mental skill or something... it's because I learned how and why the cube works as it does. Once you get the fundamentals down.... suddenly, what looked utterly impossible becomes pretty easy. And then you can go from there.
Dont get me wrong though: Some of those puzzles really ARE super freaking hard . I'm fairly good at these, but there's plenty that are just crazy hard, even for someone experienced in the hobby. There's also those that are extra easy, meant for people new to the whole thing. The excellent thing is though, once you understand the fundamentals of the normal cube, that can be adapted to any puzzle... but you have to figure out how to do so.
There's also one other aspect of the hobby: Speed cubing. The puzzles I focus on are meant to be a challenge, expected to be solved slowly. Speed cubing is the opposite: usually focusing on the normal Rubik's Cube, and it's all about solving it (or other similar low-level puzzles) really, REALLY fast. I think the world record is under 5 seconds? People into speed cubing usually have a collection of about a bazillion seemingly identical cubes, as opposed to my collection of bizarre tangled things. It's a whole other side of the same hobby really.