I wouldn't move based solely on the views of our 7yo, but I would want to think how things would be in 5/10 years time.
I grew up on the edge of a large town but there was no bus after 7pm. A few school friends lived nearby and I did play out, I also spent a lot of time on the farm with my grandparents, however as I got older, I worked in the town, wanted to meet up at the cinema etc and I missed out on things if my parents could drop me off or pick me up.
Now we have children, we moved to live in the suburbs of a city. DH and I would love to live in the country, but for our children, I want them to be able to get around on the bus or by taxi without it costing a fortune and for lifts to be 15mins not 30 or 40. We also have a good train network to get to other major cities. I think DD would love a bigger garden, which we'd likely get in the country near us, but I want her to be near places she can go when she's a teenager; the skate park, ice rink, cinema, flume park, shops etc
I also think a disposable income can be way more valuable than a bigger/better house. Having the ability to go on holiday, pay for school trips (especially expensive secondary school ones), have days out, treat your children. Although obviously not the be all and end all, it is certainly nice to be able to do those things if you want to.