I leave in a medium size town (125k), about 25 minutes walk from the town centre.
Within 15 minutes walk of me I have 3 small supermarkets, an Aldi, two farmfoods, a Polish supermarket, several takeaways, a couple of hairdressers and barbers, a greengrocers, 3 post offices, a library, several community centres, 2 scout huts, a builders merchant, 2 pharmacies, I think 3 churches, I think 4 parks but there is a 5th that may be within 15 mins. Doctors, dentists, an opticians.
I don't have a theatre, cinema, museum etc within 15 minutes (and tbh I wouldn't expect to - I would class them in the same category as a hospital). They are I think all within 2-3.5 miles.
Things I don't have within 15 minutes walk (but do within 30) - swimming pool, leisure centre, gym, full size supermarket (like a big Tesco or whatever), shops that sell "useful things" like The Range or whatever, and a DIY shop. Also my office is 30 minutes walk away.
What I don't have close by (because it's not a very well off area) is a nice cafe and/or a pub serving food. There are a couple of wet pubs though, and a greasy spoon, so that is ultimately just my taste.
It works pretty well for me, I'm a semi-fair-weather cyclist (it doesn't have to be sunny it does have to be not chucking it down unless the parking situation is truly horrendous) and in the spring/summer/early autumn I often only use my car once every couple of weeks.
In the winter it is more but I think it's a really good planning mechanism if nothing else.