If you're a regular on Creditnet, then you know that we've never been a big fan of annual fees. And who can blame us? With so many credit cards on the market today that skip the arbitrary once-a-year fee, why would you opt for a card that you have to pay to keep in your wallet? As it turns out, some of the most lucrative credit cards available require an annual fee. In some cases, paying the annual fee is well worth the benefits you'll enjoy as a cardholder, and the annual fee will pay for itself over the course of the year (and then some). However, these excellent annual fee credit cards can be hard to find, and their rewards hard to judge. So, we decided to introduce you to five credit cards with annual fees worth paying. In no particular order, these are the credit cards we would consider paying to keep in our wallet...