For me the most attractive is idea of self regulated society and decision making mechanism:

"All the decisions in Freeland are being taken by its citizens by means of qualified majority (not less than 2/3 of votes). At the same time, in any voting the question is put binary and has no more than two answers to avoid manipulation. Each vote counts as one regardless of the voter’s social status. If none of the two solutions gained 2/3 of votes, both options shall be considered potentially rational and shall be polished till the agreed decision is taken in favor of one of them"

It means that each of citizens will have influence on all important things in life of their country, it will help to avoid stupid or selfish laws. Looking forward to to see it in real life, not just on paper.