I want to say I use it for the insight and information it provides me, and that's true but I'd be lying if I said that was the my main reason.
The real reason I have for experimenting with it is because, whether I'm right or wrong, I'm convinced I come from 'there' and am destined to return 'there' after my death. It feels like going home after a really long, arduous journey. I don't have to try to explain to anyone what being homesick feels like, we've all experienced it at one point or another. To me, it's my ticket home, even if it's only for a brief period of time.
I'm kinda getting choked up just thinking about it. That's how important it is to me.