Yeah, same here. I do this all the time.
The fact that AT&T is the cheapest option for me ($75/month for unlimited data, 450min, 1000 sms) and that it's the only one here that does this basically forced me to keep it. — Now, I just have to figure out how to unlock my phone (@cutyoursim?) and whether or not I want to rent a phone for LTE or just get a SIM Card whenever I travel.