If you’re affixing a permanent, visible object — like a sticker or a label — place it carefully.
Not because it really matters, but because it communicates thoughtfulness and deliberate action. It’s a signal.
If your intention is to be casual, then have at it. Slap it on breezily.
But if it “wants” to be aligned, make sure that it’s done that way.
“That was supposed to be straight, but it’s crooked instead,” is only charming in kindergarten and Pisa.