You want to keep the albino strains, the snow strains and the eye pigments all pure. In other words, do not mix them up. The more they are mixed, the harder it is to keep any of the lines pure.
You should check out this write up from John at GeckoBoa -
https://www.facebook.com/notes/gecko...46291942084386
He goes into great detail about leopard gecko genetic crossing and why you shouldnt mix certain stuff.
You could also check out the following 3 video's from Matt of SaSobek's World of Reptiles!
http://www.youtube.com/watch?v=R5mo4HbAYZY
http://www.youtube.com/watch?v=pjUoGitg3Cs
http://www.youtube.com/watch?v=e9lfU0D_F2o
This is some good material whether new or old to the hobby!
Hopefully this helps shed some light on what Kristi and the rest have been saying.