Hi Ken,
Something I'm wondering is how someone who had been in space would reflect on it , say 10 years later?

Would it be better for him to have spent 5 minutes in space during a parabolic flight (in terms of what he remembered and how much of it), or should it be an orbital flight lasting 9 hours or 7 days? Should there be a spacewalk and for how long? Should there be a Moon flyby and back for 7 days or should there be a moonwalk with a 2 week long mission...I mean vacation?

(Definitely not a long term flight because of the routine, the human interaction, etc...).
I'm interested because I've been flying for 8:30 hours in straight trips and don't remember much of what happened, while I've also been on 5 minutes long helicopter rides from the bottom of the Grand Canyon to the top. However, during the plane flights I was relaxed , in fine shape while back from the canyon I had hardly slept for 4 nights, was not shaven, had not been to the toilet for the number 2....Well, inspite of that, the helicopter ride was the top...but so short!
So, the ultimate human experience would be ....hmm, for me the big 8 around the Moon with a spacewalk!! 7 days, faster and further than anyone!