The point of each survey is to present you with a topic you're interested in and qualified to discuss for the benefit of the researcher. Surveys range in time required, from very short to quite long. Because researchers are looking for opinions only from certain segments of people, you may find you have to try a few surveys before you're qualified to give your opinion on one. Keep at it, and you'll eventually find one that's right up your alley.
One other well paying survey site is Vindale Research. They have been around for awhile. I just joined them and got $2.00 just for creating a account. The thing I like the best about them is they send you brand new surveys to your email with how much you will be paid to take them. They also offer to transfer your money to your paypal account or send you a check. Check them out and sign up here http://tryvindale.com/VJTb1g9Q
It’s a very well-known scam. You cash the check, then they ask you to either wire some of that money back to them as some sort of fee or buy something for them and send the item to them. So, you deposit the check, then wire some cash to them thinking that the check you just deposited will cover that. A few days later, after you already send them the money, the check will bounce and the money you send to them will come out of your own account.