Very few people here have developed more rolls and sheets of film than me. At my zonish peak, it would take me months to really figure out all the ins & outs of only 1 or 2 developer/film combinations. Gaining mastery of just 1 single emulsion and a single developer is no trivial task. The idea that it might be possible to investigate many such combinations at the same time and reach meaningful conclusions seems hugely impractical, based on my remembered experience.
Words of wisdom...get one film and one developer working exactly right and don't rock the damned boat afterwards.
For instance, expect to spend at least a dozen or more development iterations just getting the film agitation correct enough that there is no development induced density mottle. I know quite a few photographers who never got that far. But as far as I'm concerned, those old Nikkor tanks and reels never looked more handsome than over there on the shelf, and that's where they will stay.
Rodinal, Acufine, Diafine, D76, FG-7, E-3, E-4, C-22, C-41, all kinds of esoteric German developers that came in sealed glass ampules, it was so wonderful and all so wizardly. And there is something abount the gurgling sounds, and smells, and the rotating inertia of stirred photo solutions, and the clinking of stainless steel tanks, you had to have been there. But what a hassle. But OK, just promise me you'll stay away from HC-110, it's the pits.
And I scanned a bunch of 35mm and 120 negs recently for a documentary. I had forgotten how grungy film would be. I though something was wrong with my scanner. Went back and looked at original prints. Nothing was wrong with my scanner. Don't expect too much from film. Actually, nobody I know from the good old days who actually used film still does, except for masochistic purposes.
But it could be fun, too.
OOOPS! Kirk still uses film, sometimes, and to good effect. Maybe he'll chime in. If he does, be sure to listen.