I chose them primarily because i wanted to learn about another type of mouse. I breed selfs, and had dabbled in satins and tans, all of which require slightly different skills and ways of looking at them to breed good ones, but I hadn't yet tried a ticked variety. You learn a lot from each section - at some point in the distant future, i will have to breed a marked variety also, to learn about the intricacies of that section. I see it as a kind of apprenticeship!