So now that we can filter the review queues by tag, can you do the same for the Flag queue?
I have over 10k rep so I get alerted whenever the flag queue gets too high, but encounter the same issue I had with the Review queue: most of my rep has been gained by questions within a specific technology, so I only feel comfortable reviewing flags within that tag.
I would also be much more likely to review flags for in tags I'm familiar with and can understand the question content of then I would be to review flags for technologies I'm not familiar with, and it would give me a bit of pride to help maintain "my" section of SO.