Keep in mind that the tags will change over time as more users get on to SteemIt.

Also, to get a real idea of how well certain tags pay out you need to consider both the number of threads and the total amount of payouts for a given tag. I did a bit of math and came up with some numbers over here:

https://steemit.com/steemit/@weaselhouse/steemit-earning-sbd-and-building-your-audience