Yeah...This one is conflicting to me.
I love pit mixes, but I've noticed myself voting for other breeds too. The internal conflict almost makes it more interesting.
I also find that when it's a rottie vs rottie, it can be difficult to judge, since they both will look so much alike.
For example, my ex absolutely adores the pugs/bulldogs family, but has a mysterious distaste for poodles. A comparison limited to the same breed will give you better ratings, but also makes it harder till you hit critical mass.