Many companies feel cultural fit is extremely important and they use outside interests as a way to determine how you will fit into a team.

Even so, don't be tempted to fib and claim to enjoy hobbies you don't. Focus on activities that indicate some sort of growth: skills you're trying to learn, goals you're trying to accomplish... weave those in with any personal details. For example, "I'm raising a family so a lot of my time is focused on that, but I'm using my commute time to learn Spanish..."