I am grade A piece of hot credit ass and it's because I hate credit. It's like the chicks who won't put out; they are more desirable.

So true.
I concur with the opinions to get a card but only use it for the basic living expenses (while you're a student) and never carry a balance.
However, I have to disagree about rewards points and spending habits. I'm aware that there are lots of people with poor financial sense who overspend and impulse shop with CCs, but if you can budget properly, it's possible.
I save a fair bit and I don't make a lot of discretionary purchases. I use my CC for gas, groceries, car maintenance, clothes (though I don't buy a lot), Internet and cell phone bills. However, if I want to buy some DVDs or a pair of shoes and it's in the budget, I'll put those on my card.
Also, when I go on vacations, I pay for flights and accommodations on my card. Most CCs also give you a bit of purchaser's insurance, so that's worth something.
Over the years, I've only used my rewards points to get a gift card that I used for a microwave. But they add up quickly. I have more than enough points to get a good flatscreen TV for free, for example, but I don't want that right now.
I've never carried a balance in the 8 years I've had a CC and I never plan to. If you're responsible enough, it's really not a problem.