What crate do you prefer for your dogs?

I have 3 dogs, all of which are crated when I'm not home. I've tried the wire type crates but overall just don't care for them for my crew. Instead, I use the hard plastic, especially since they seem to be more handy (and safe, IMO) when travelling.

It seems like a lot of people prefer the wire ones as opposed to my choice but overall plastic just works beter here.

What do you use?

I use a wire crate. Seems cooler in the summer and in winter we throw a blanket over to hold heat in. My guy seems to like that cave effect