I'm leaning slightly towards substance dualism

This seems a bit like trying to fix a problem by applying a patch that causes a lot more problems. The stunning success of naturalistic explanations so far in predicting the universe (plus Occam's Razor) alone would enough to convince me that consciousness is a naturalistic process (and, in fact, they were what convinced me, plus a few other caveats). I'd assign maybe 95% probability to this conclusion. Still, I'd be interested in hearing what led you to your conclusion. Could you expand in more detail?