I've been on Steem for well over 2 years. With zero transaction fees and 3-seconds transfers, Steem is able to support responsive social applications like with the case of Steemit.com, D.tube, Dlive.io, and such. With the upcoming Smart Media Tokens, anyone would be able to launch their own Steem-like tokens in the future like Ethereum's ERC-20s, but more useful in the sense that the token can be used to fuel perpetual and autonomous growth. I like simple projects with wide and easy adoption that people will come back to use everyday. Steem is definitely one of them.