I like best in bitcoin the simplicity of use as well as the anonymity that it brings. It basically means a freer market which is always good in my opinion, and a currency without government intervention.
That is definitely better than fiat currencies.
Yes, I like it is anonymity too but the most is I like it's flexibility for online payments most instant and no security issues and no risk. I can easily store my money without any control of government and central authorities !