Do you actively play with your toddler?

My toddler is 15 almost 16 months. Just curious where everyone is at with play time. I try to get on the floor a few times a day and play one on one with him (cars, building stuff, etc) and he loves that special mommy time. But for the most part I let him run around freely while I cook or sit on the couch/do laundry/clean. He is really good playing independently but sometimes I feel guilty. Are these feelings normal?