I've decided to take a look at Inkbunny. Aside from a few UI problems (in particular, the green bar at the top with its mess of icons for "self/user profile/account settings/post/sales/bookshelf/exit"), I quite like the interface.
Tagging is relatively easy, I love that I can block submissions based on tags, there's something akin to "folders" (Pools), and there's some powerful integration with Twitter and AlertPay that's compelling (though I suspect they might lose AlertPay soon for similar reasons to FA).
made a very clever migration tool that makes it relatively easy to populate your gallery on InkBunny with your FA submissions, which is what I used to bring over my art relatively easily. So - for now, we'll see how this goes.
I don't do art very frequently. In fact, I've been in an artistic drought for a while now. But I hope you like what little I do post when it comes.