It's not a question of whether freak perfs, centering, etc. are errors per se, but rather at what point are they viewed as being desirable rather than shunned. That threshold is different for everyone.
I like a good dramatic freak item... but I won't pay a premium for it. I may pick up an item that has sufficiently bad centering if the price is right. The ones above don't meet my standards for dramatic misperfing. They are simply poorly centered, in my opinion.
I tend to lean towards examples that show parts of two separate stamps.
Some examples that I have retained as being "bad enough":




P.S. Margin imprint captures are a hole different animal. Love 'em!