What do you think is the Key Feature of Island Living?

For me it's the new careers -- mainly the conservationist aspect, caring for the environment and seeing the world change in response. But I do like the other career aspects especially the odd jobs; they remind me of the job board we had with Sims 3's University Life, and hopefully this means we'll get a similar feature if/when we get a University pack. I need to start a non-Sulani save to test a few aspects of the odd jobs.