I had smoked weed for the first time when I was 18. I was out with some buddies in the woods, and it was amazing. I felt this amazing euphoria, and I felt from that time on when I did smoke, that I understood every spiritual truth, and I understood how the universe worked and I felt that everything was okay. I also felt that I knew everything that was going to happen had already happened, and I was annoyed at first, but as I got used to it, I steadily began to predict when things would happen. For instance, I was at a friends' house of mine and I looked up and said, "Someone's coming. Lock the door." (that last bit was, of course, a side of effect known as paranoia >.>) So, she did, and not 20 minutes later, someone knocks on the door and it turns out to be a friend of hers bringing a christmas present.
So anyways, I honestly think that the weed experience is what you give it. Since then, two years, three years ago, I've had a lot of anxiety around weed. It doesn't do the same for me like it did in the beginning. Sure, maybe every now and then i'll feel relaxed if I'm with good company, but most of the time it's uncomfortable. Honestly, i think it's because I smoked salvia once, and it was really horrible. it was an actual visual trip, with holographic, geometrical images, and I just felt like I'd lost my mind. *shudders*
Just do what feels right
OH--and one last thing: DON'T DO THE "LEGAL" SMOKE. It's really bad for you. Seriously...