Yes, I do. It's the "masquerade" rule in my router's firewall rules table.

> The only thing you "lose" is that your whole house looks like one device.

That's a feature, not a bug.

> You gain a significant reduction in latency, online games will work better and p2p networking (such as voip) will have significantly fewer problems

99.99999% of those problems are caused by shoddy Wi-Fi. IPv6 does nothing to fix it. (Directional antennas and a standard way to bridge L2 over Wi-Fi is the real solution; expanding the IPv4 address space does nothing.)

Again: what's the benefit of IPv6 to me? So far I only see downsides.