Here I've compiled an average for each theme using all of the screenshots of final round voting that I could find, both on this website and on Twitter.

"Side effects" has consistently held the first place spot for nearly the entire voting period so far, though by a razor-slim margin. "Connections" and "Dreams" follow closely in 2nd and 3rd places, respectively.

"Outdated technology" and "Ruins" lie comfortably at the bottom of the rankings.

Edit: I should mention that this is a count of 28 ballots. Hardly an amazing sample size, but it's something. I'll be curious to see how closely this matches the final tally.