What crate do you prefer for your dogs?

We are currently crate-less because the crate I bought for Peanuts was too small for her. I tried introducing Chooey to the crate but she would only follow Peanuts wherever she sleeps. And the plastic crate is a bit hot given that we currently have a hot climate.

I prefer wire crates because they are definitely cooler. But for transporting my dogs whenever we travel, plastic crates are the best. And they're only the ones allowed when flying by plane.