1, Ah, now there is quite a story. I remember when the first Bionicle sets came out in 2001. I was in fifth grade, and some of my classmates had brought in their sets to sort of battle each other until the masks came off. I guess you could say I wanted to impress everyone by collecting all six sets in the "Toa" series, but by the time I eventually got them all, it was 2002 and my classmates had moved on to the new "Bohrok" series. I eventually got all six of those, but then came the "Toa Nuva" series, and only managed to get half of them when I realized there was another upcoming series (I later learned it was named "Bohrok-Kal") and figured there was no way I could keep up with all of that. But it wasn't long before I finally began to find out there was actually an epic storyline behind the sets, and by the end of 2003, I was devoted to closely following the story and desperately wanted every single set I could get my hands on (starting with getting the rest of the Toa Nuva and then all the other series that came after). And that continued for years all the way up to 2010 when the theme was finally ended. I honestly can't think of many people who have amassed a collection quite as extensive as mine.
2, Neither, actually. Never tried either of them, and I have no interest in trying either of them anytime soon.