One day we will be able to, but there are a lot of issues before getting there.
As Steven has mentioned, terraforming is one proposal for making mars better for us to live upon.
Another option is to create biospheres. Biospheres are sealed environments that carry out the same functions of what our environment does here on earth. Think of a football stadium, with a sealed roof, and we would live in there with plants and others things growing to keep us going. Connect a few of these together and it is possible, but it is very costly and there is still a lot of work to go to make it work properly.
If there was something set up so i could live on mars, then yes, i would love to go there and visit for a time.
Another place in our solar system i would really like to go, would be Europa. Europa is a moon of Jupiter and is thought to be the best alternative place for life to exist in our solar system as it has huge oceans. But there are many problems with getting people to places like this, thats why robots are sent to these sorts of places.
Oddly, not really. I’m quite happy here on Earth. If there was a particular reason to visit or live there, then maybe. Turns out I can do most of what I want from this planet. Actually, I think that is the key. Colonisation of other planets is so expensive, there has to be a really good reason for doing it. If it is to harness natural resources from solar system bodies, there may be better ways. I struggle to come up with a reason for living on Mars that can justify the expense.
I disagree with Steven about terraforming being environmental vandalism but then I’m a bacteriologist and I like the idea of bacteria opening up another planet for human expansion to in the future. You know when we finally break this one.
While difficult it is certainly possible as Mars has some very similar properties to Earth and has apparently similar soil, available water and an abundance of carbon dixoide in the atmosphere and frozen on and below its surface.
While I don’t think we will be going there any time soon, it seems it is possible and may be something we are forced to look at quite a while down the track.