Mostly because I had expiring grading vouchers and was already planning on going to coin show where PCGS was taking orders (saved on shipping). I tend to prefer PCGS a bit more than others. I have nothing against NGC or ANACS, just prefer PCGS since those are the slabs I started collecting years ago. I still will pick up a coin graded by others when it strikes me, but presented with two identical PCGS/NGC coins, I'd lean toward PCGS. The four I chose to cross happened to be ones where I thought I could gain .5/1 point on the grade and where I thought they'd looked great and could benefit from PCGS's TruView. I know NGC has similar photo service, but again; I tend to prefer PCGS.