I think acid, like 'shrooms, are one of those things to do at least once if you approach it as a learning experience. I've only done it a few times, alone, and that's all I needed. My first time, when I was living in the Haight in San Francisco, I took two hits, walked down the street and started coming on. I was looking in a store window and my brain cracked open. Just standing there in bliss/wonder and two old hippies, right out of 60's central casting, came up to me and we're saying things like, "It's going to be amazing...have an incredible time...you're loved." They knew. Blew my mind. I hugged them and went off on incredible experience. They sent me on me on my way with what I needed. Pretty cool. I think it's all about the mindset going in.