I love it so much, that I went too deep and ended up having to shim to get the hinge flush with the new-old door edge. But really, mortising is surprisingly enjoyable. I like that fine hand work and precise detail. It might also have something to do with the fact that I successfully hung the new-old door within 2 hours! The last time I hung a door, it took me about 8 hours.
As I was working on this, I was thinking about what kind of old house this new-old door came from. I was also figuring that the hollow core door that I was now replacing, probably replaced some other heavy 5-panel door. Then I wondered, that replaced door is probably now in some other old house in town. Maybe the same house that this door came from? Whoa.
I still need to paint, install a knob, new strike, etc. but I'm really liking that 5-panel look. See if you can spot Scully. She sort of blends into the floor, being all dark chocolate and stuff.