I had a Springer Spaniel as a small child. I loved her dearly but we need a less energetic breed.
A kind temperament and tolerance of children is key. We have three kids: 11, 8 and 5. The 11 year old will be very involved in walking and caring for the dog.
We live in the middle of a city. We can easily walk in the local park several times a day. It has a a fenced area for dogs being off the lead and it's not huge. At weekends we can go further afield but huge country walks will be rare.
Three days a week the dog will be alone 9-3.30pm.
We have a decent sized garden.
I would prefer a dog that isn't too yappy. I really want a spaniel (see above) but can't due to exercise constraints.