I've made characteristic curves of film and found it enjoyable to prove to myself that the curves shown in the books are indeed the way film and developer behave.(posted 8835 days ago)Now I use densitometry to select film speed (I use 0.1 above fb+f, which is a standard definition of B&W film speed I believe) and developing time (I aim for D=1.15 for Zone VIII which works well for my condenser enlarger).
Print making is, as Conrad said, by eyeball. I don't think you would find yourself refering to your database very often. I'll bet you'll still fine-tune your prints once you see your first print of a particular negative.