Just as a contrary standpoint, I personally like to see the Paypal logo and the fact that it is Paypal processing my payment and not some I-roll-ed-my-own just-wait-for-me-get-hacked random system.

I also learned to loathe stripe (and square) due to those PoS system that have ridiculously high tipping options even for transactions that really ought not to be tipping situation. No, I do not want to give 20% tips when buying bread over the counter at the bakery, thank you very much. (This may not be stripe fault, but the store owner. I resent both just to cover all bases.)