Sensible: What is it you want, exactly!?
Glen: ummm ... well what I REALLY want is a simple technique that makes my well lit, properly colored pics turn into luscious B&W images that just ooze with delicious silvery drama.
Sensible: Yeah, well, good luck with that. You might wanna try the K-Mart down in ... ummm ... Ulaanbataar.
Glen: Is that near Doylestown? Duh, nice try. Even I know the K-Mart actions are just cheap Chinese knock-offs. Meanwhile ... I'll accept a technique that lets me tweak a few knobs to get somewhere close to that in ... say ... 2 minutes :D
Sensible: We're approaching planet Reality now.
Glen: But I never got my in-flight drink ...?
Sensible: What control do you need to get this ... errr ... "silvery drama" thingy you're looking for? I assume it will involve -
a. Control of tone-to-gray mapping
b. Vignetting, toning, grain, yada yada
b. Dodge and burn control
c. Control of local and global contrast
Glen: I think it comes down to the tone mapping. I can do all the other stuff pretty fast the old fashioned way. What I need is a technique that corrects any and all color problems and then does the perfect tone-map to B&W. Of course, the tone-mapping will need to be different for landscapes ... portraits ... yada yada
Sensible: I'll get back to you.
Glen: Yeah, that's pretty much what I thought. Meanwhile, here is an example of an image that needs better technique.