Gas Credit Cards
I am a big fan of credit cards in genreal and I also support using credit cards for gas, but here is a major pet peeve I have when using my Paypal Mastercard for purchsaing gas. For some reason when I proccess the card at the pump it always dials in for approval of a $75 minimum charge and then because my Mastercard is directly linked to the card it puts a hold for that amount of funds in my Paypal account. Sometimes it takes a whole week to release the funds and it always nags at me because I am worried I will be charged the $75 amount instead of the actual amout of gas I purchased. It has become such a problem that I am seriously considering getting a gas credit card to use for my fillups instead of my Mastercard, they ask me everytime to apply for one anyways.

