That would have been my "new banner" thread, and another comment by Rufus that mysteriously vanished
Anyhoot, yes, my models are based on green bases with kitty-litter topping. I think of it as not so much "passé", but rather, "retro". Or something. It's my experience that bases look pretty good in whatever colour, as long as they are done neatly and consistently across the army.
However, I do think that, as my army is very bright (red and blue, with details in yellow and white), a darker base scheme may help to frame them better. Depending on how much time I have left after I model and paint the stuff I need for the GT, I may go back and repaint the base edges in Scorched Brown.
May being the important bit