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If an 8 (or anyone who knows for sure) wants to chime in and correct me here, my understanding is that those types of experiences/goals have too many unknowns for an 8. There are too many variables for them to try and control.
Those sound 7ish to me. For me, it is interesting to look at paths for integration. An 8 grows towards 2, and often find themselves helping others, especially the young, innocent, naive.
When I was younger I did things like you describe. Older I have slowed down in the real world and focus on helping others and find pleasure in that. Right now I am a professor, and love it.
Through it all I NEVER lose track of power and who is in control. I WILL be in control of me. I have learned I don't need, and can't control others, but this was a learning event for me.
I think a difference is do you look for train wrecks, and what do you do then. Do you LOOK for hurt people in need of help? Do you help them no matter how ugly it gets?
A 7 to me looks for adenture and fun. I look for adventure and fun in helping someone.
When I look back over my life, I have volunteered for search and rescue, lost people, domestic violence victims, fine arts stuff. The sense of adventure of hopping on a motorcycle and riding hte country doesn't appeal to me as much as it would a 7.