re: Spacewalks
Spacewalking is the best thing an astronaut can hope for (today)!
There are astronauts (like Reiter, Chretien, Haignere) who spent a long time in space during a stay aboard a sation but for them, the highlight of their flight, the reason why they went up there, what they always mostly talk about, is their spacewalk.
Now, about another kind of walk (outside) .....on an alien world, that would also be great, of course!
Raoul