I prefer wood on blue steel, and as near to original grips for the 'classic' look. I used to have a nickel 442 that came with rubber 'boot' grips, and I lusted over the wood grips in the Eagle brochure that came with the gun, especially some of the eye-popping laminates!!
I swapped it for my 49, which also wore rubber when I got it. Against the blueing, the black rubber was an eyesore. A set of used, old-style 'lemon peel' grips gave it that classic look for which it's so famous. A black T-Grip detracts little from appearance, but vastly improves shootability.