I like how steemit has votes instead of likes as the semantics are more engaging.
Facebook's curating process is downright creepy; using metrics to curate content like how slowly or quickly you scroll through each post.
I also like how steemit rewards all users in steem dollars and steem power, giving its users a stake in the future by default. Actually I'm not sure if that is default behaviour or if it's just because I 'powered up' - but it certainly should be default behaviour if it's not already.
'creepy' haha great word for describing Facebook! I find it hard to keep positive on there as the algorithms are always changing and you never really know what to do to get your stuff out there successfully! I like the simplicity of Steemit (on the surface, to be honest I still don't understand all the background stuff!) and look forward to seeing how it develops. :)