The colours you get from Rodinal/Adonal/R09 are one of the thrills of using it :P

Fomapan 100 turns Rodinal a lovely bright green (and as Polyglot points out, the base is meant to be blue).
T-MAX 400 and APX 100 give a deep purple, whereas T-MAX 100 is more pink.
Most Ilford films don't change the colour at all, and there's one film I can't remember that gives Rodinal a horrifying fresh-stop-bath yellow colour.

Certain films do need stronger fixing as well - T-MAX films that come out of the fix with a strong pink base colour are underfixed, for example.