I've been reading this thread with interest because I'm now right back into developing and priting in B&W. Thomas said "I maintain that I think Rodinal is a developer that adds a little bit of texture to my photographs, while Xtol yields smoother shifts in tone."
This is what I'm finding. But it seems to depend a lot on the films.
I am looking for a certain "look", and I KNOW I can get the "look" I want from certain combinations. So I don't use a "standard" film, but standard "combinations".
Here's what my "Renaissance" has led me to use:
TMax 100, Rodinal 1:50 - produces very detailed and fine grained half-frame negatives, which is where I use this combination. Beautiful tonality and prints. I shoot more half-frame than all other formats combined, and this combo is dynamite. With my Mamiya C330 and that medium format neg in tandem with the Pen FT, I could actually do without 35mm full frame and not really miss it. I always carry a Pen F around with me in my bag, loaded with XP2. But that's another kettle of fish. This TMax-100 and Rodinal combination actually looks VERY similar - just a bit more contrast. Makes wonderful 5x7 prints, my favorite size.
FP4, Xtol stock - my choice in any format for portraiture. Prints beautifully on textured paper.
HP5, HC110 at 1:63 - my choice for general purpose photography. For medium and large formats, I seldom use anything else. Reliable, incredibly forgiving, and pictorially smooth and detailed on prints, especially Ilford Galerie.
Tri-X and Rodinal at 1:50 - my choice for general purpose photography in 35mm full frame. A bit more "punch" than HP5 in HC110
My current flame, Fomapan 400, Rodinal 1:25, for high impact grainy images in half-frame format This same film is very smooth and luminous in stock XTol, looking a lot like Tri-X in Rodinal.
I'm currently experimenting with TMAX 400, which produces incredibly beautiful prints in Xtol, and might become my favorite combination of all.
I'm also shooting some Kentmere 400, but have not printed it yet.
The combinations above produce consistent results for me, and I know what they are going to look like. I could probably get the same variety by using one film/developer combination in various exposure and development time guises, but frankly, I want to get out and shoot pictures more, for a while at least, before I play around again.