I have hides for some and not for others. My little spider male prefers to smush himself between the hide and the tub, my pastel female likes 2 hides and a HUGE bowl so she never has to touch the ground (a little spoiled, that one) and no matter how many times I give my male mojo a hide, he'll shove it to the cool side and sleep under the paper towels instead.

It's a personal preference