Hmm.
Depends on where, and also how far we went- If I knew I would never see Earth again, it would be a very strange feeling.
(Plus if the long journey inside a claustrophobic space ship with annoying fellow cosmonauts didn't unleash some sort of cabin fever, I'm sure the final realisation that I had to spend forever with these people on a desolate frontier planet developing new types of agriculture and giving birth to children to boost the population would make me mad as a bat at last)
But on the other hand it evokes the explorer curiosity... Unknown lands, to boldly go where no [wo]man has gone before... Different atmoshpere, strange gravity, perhaps even... alien life!
And the power politics/personality struggles,factionalism and intrigues and so on would out-do any reality tv...
< adopts serious TV announcer voice >
...What makes us human? How would our way of thinking, worldview etc. change if we lived in a radically different environment, especially under potentially threatening and harsh conditions like on a distant, unexplored planet?
Would our metabolism evolve/change, too?
If we don't count artificial, technological enchancement to the body- How would our body turn out if the gravity was so weak/strong that our entire muscle mass started to deteriorate, melt, or change on a cellular level? Could we move our brains into AI shells and leave the body behind entirely? And what would that do to our perception, motivations, our sense of self?
And what about the inbreeding problem on an isolated colony? -Surely already at the space travel stage- if the journey was long/slow enough- There would be a very minor gene pool to choose from, and with time perhaps the astronauts reaching the planet at last would've devolved into degenerated neanderthals bopping around in the front deck lounge, throwing 'primitive' acid house parties and drooling on experimentally cultivated hallucinogenic plants...
um
Before[/I] we're able to develop any sort of super fast lightspeed travel hyperdevice thing, it seems space travel will be pretty risky...
BTW scenarios such as the space elevator which eliminates the return option altogether- just a gigantic one-way ticket catapulting you out into deep space... sounds like a very exotic kamikaze exit... but not something anyone in their right mind would volunteer for.