I like Turks. The adults are about the size of an adult cricket. They move quickly, and that seems to make them more appealing. The do not climb slick surfaces. They breed very quickly.
I also like hissers. Full size adults are too large for most chams, but the younger ones are great. They are slow movers and are interesting in a way most roaches are not. They DO climb. They breed relatively slowly compared to Turks and Dubia.