The feel of the school, do they make an effort to brighten it up. It will always get a bit shabby before they repaint, but that doesn't matter if they put up colourful posters, artwork etc.
Outdoor area, especially if it's all the way through to yr 6. Sometimes all they have modest size grass area which is taken up by boys playing football. I say boys because even when girls play football for teams they don't often join in.
Before and after school care/clubs. Previous school of the boys had very limited clubs and no general after school care. Clubs are very limited in number and can't usually be used for ad hoc care if needed. Current school has external providers and we use it for as hoc care.
Age if teachers - old school had a head teacher that had been there for years and a lot of the teachers had been there with her for a long time too. They were nice, but it did feel they were coasting a bit. When the new headteacher came in and they were asked to submit new lesson plans to him a couple of them decided to 'retire' as they really didn't want to put that much work into it at that point in their careers.
Does the HT answer your actual question or feed you the party line? You need to know they will listen to you and answer your questions. Always worth asking a question that is slightly unusual to see what happens.
How often they send out a newsletter. Current school sends out a fortnightly newsletter and the back page is a list of dates for the diary, running several months ahead. This allows you to plan. Previous school would let parents know a week or so ahead sometimes about events and get stroppy when parents couldn't help/join in/provide costumes etc.