Citi / AAdvantage Globe Mastercard overviewThe Citi® / AAdvantage® Globe™ Mastercard® (see rates and fees) is aimed at travelers who fly American Airlines about once per quarter. It's best suited for semifrequent flyers who can maximize the companion certificate (starting in your second cardholder year), the checked bag benefit and the lounge passes. However, it's less compelling for travelers seeking stronger earning rates, unlimited lounge acc…