My wife, my older child, and I all had quite a bit of experience that was very closely related to our graduate school applications (younger daughter is gaining related experience now). No one seemed to care whether I had taken up bowling or ballroom dancing or sailboat racing. The fact that I had used relatively advanced mathematics and physics in a research position seemed to matter when applying for an applied math graduate program. Similarly for my older daughter the fact that she had thousands of hours of working with animals in a veterinary and/or emergency situation seemed to matter when applying to DVM programs (some of this was on the job, some of this was in a volunteer capacity).
Similarly, the work or research or volunteer or EC experience that you have that are related to your intended graduate program are likely to matter quite a bit.