I agree. Its easy to enough to test while you're working. If you keep some simple notes, it will be easy to decide "Hey next time, I'll add 1/2 a stop of exposure and develop another 2 minutes, and I'll bet I'll be right on" I've always been amazed at the number of posts that you see on ph***.net that ask questions like "My negatives are thin and low contrast, what do I do?" Doh! Expose a little more and develop a little more.

The only time you need to be a little quantitatively obsessive is if you are doing some process that has no contrast control in the printing, and demands a negative of a particular density range. I've found argyrotype and VDB to be sort of unforgiving in this way. But the easy way is just to stick to processes that give you some ability to compensate for variations in the negative's density range: variable contrast silver gelatin, platinum/palladium, and maybe gum. If your time is short, and you're not shooting for a client, just take pictures and learn from them, and modify things as you go. Or take advantage of other's work, as has been mentioned previously.