Currently I upvote and self vote on about a 1:1 ratio. Personally I enjoy supporting minnows via curation, but the only way it is worth my time is with self voting. Curation rewards are currently useless as an economic incentive, and I say this as someone who spent months trying to make a go at curating, but Steemit needs curation to thrive. I've been attacked for self voting but at this point I still believe I give more value than I receive. YMMV