I love Ontario rock, but I miss the way sandstone is clean and predictable. The way you can smear a toe on a blank wall and it just accepts your weight. Limestone is forceful. Unforgiving. It bites the fingers and slimes out from under the toes. It requires balance and finesse and utter faith in your own ability to keep on. It offers no comfort.
And granite; that's an entirely different game. Almost as grippy as sandstone, but with an element of surprise. Dirty, gritty, sandy, and covered in slippery lichen. A crack looks clean and positive, until your fingers try to stick and find themselves frantic in loose dirt and spiderwebs. I place a cam in a perfect bottleneck only to find that the rock I thought was safe is mostly composed of lichen dust. .
They say some of the best climbers are made on Limestone, right?