I think the toy issue is largely overwhelming when you have younger children. I remember the play rooms (yes, plural - rooms) that DD would have and we could barely keep them organized. Okay, we didn't keep them organized. When I packed to move I resigned myself to never finding the pieces to all the games - because I had tried so many times before - and just chucked multiple garbage bags of flotsam that I'd pick up from the floor.
At one point in our lives, hubby did give up his half of the garage to storing his electronics stuff but he is a hoarder. Now we don't even have a garage so no worries there.
This house does have an amazing lack of storage. Between that and decluttering for the move, we pared down a lot. My biggest bug-a-boo is Christmas stuff. Even as much as I've trimmed and scaled back, it takes up an amazing amount of space (at this point a corner in my dining room).
I think electronics have helped us scale back. I no longer have a calendar hanging on a wall. DD no longer has a need for a multitude of toys (she plays on-line games). She doesn't even need a TV in her bedroom because she downloads videos to watch on her itouch. She does have boxes that she hasn't unpacked yet. We're still looking for bookcases for her bedroom so she can organize her craft supplies. She needs bedroom furniture in general.
But back to electronics. Right now I haven't unpacked any of the books. I have maybe 6 boxes. I have never before imagined ever living in a house where a bookcase - a whole library was always my dream - didn't make a major element in my room design. But right now with e-readers, I'm questioning every book purchase and reconsidering whether or not I even want to keep the few precious ones I already own.
We aren't in the backyard, not because we don't have time, but because it is so darn hot right now. When the weather is with us, we're outside more. As a matter of fact, we normally take a walk after dinner and go hiking on the weekends.
I have to say clothes are #1 in the clutter category. Have you ever noticed that you can buy clothing anywhere? Go grocery shopping and they have clothes for sale. Pick-up a prescription or just cough syrup and they have clothes for sale. Go to a sporting event - more clothes. Go to an amusement park - more clothes. What do you see most in any thrift store? Clothes. They overwhelm us.