Taking the time to thoughtfully fill in your answers can make a huge difference in the quality of people you attract. While your photo is your first impression, your answers give an opening for starting a conversation. McLeod suggets "saying something that's unique to you and spend a moment to really think about it. You're investing an extra five or ten minutes in something that could significantly make a difference in the person that you end up with for the rest of your life."
From personal experience, avoid generic answers like "Pet Peeves: Slow Walkers", or "Looking For: Someone Who Doesn't Take Themselves Too Seriously" (which I've definitely been guilty of). Some of the best answers are personal, unique, and a witty. Maybe something like, "Sign of a Good Date: When Neither of Us Check Our Phones" or "I Know The Best Spot in Town For: Good Wine with A Great View of The City."