Well, I prefer IVs to shininess if I have to choose, so I have done everything else non shiny. However, I already have some decent Regis from Emerald, so I figured I might as well get shiny Registeel (Which I actually like a lot), and Regice (It isnt very useful anyway).
And make sure you search high delays for shiny spreads, I didnt have anything good when I restricted it to things I could hit without Pikatimer.
That's good to hear. My Regice will be unique :D...besides, unlike most people here I don't have AR'd max balls and 100% catch code >:[