You're right, perhaps I should have been more specific with my post. Of course, much of the above isn't required for living. However, these are feats of human endeavour (electricity/architecture etc) that have, for the most part, made life for plenty of the global population much more comfortable and is a testament to our advancement as a species. I really don't feel that can be equated to killing a crocodile to use its meat for burgers, just because it 'might be a fun thing to serve in a restaurant'. My opinion, of course.
With regards to space travel. I am of the thought process that space travel is actually a requirement. At some point in the next multi-million years, our nearest star is going to expand and destroy our planet, so it's probably best we find an escape route by then, unless we wipe each other and every other species off the face of the planet beforehand

Could be a moot point, if scientific history is anything to go by, The Sun turning into a Red Giant may not even be witnessed by our species as perhaps we will have already gone into extinction? Sorry, digressing. I am also all for space travel to one day become a 'norm' for the population as i believe seeing our planet from such a spectacular viewpoint could possibly change people's attitude's towards conservation for the earth and all it's inhabitants.
Music or art? Depends how in-depth one can delve into this. I certainly do feel it is a 'requirement' for many species to have emotive expressions of rhythm and movement. Many species will use sounds and dance as a form of expression, either to express emotion or information. Perhaps when it comes to painting pretty pictures and the like, that could be reserved for us as a species as a 'requirement'. Some people can only express themselves fully through art. I would class that as a requirement for living personally, at least for some of us.