I’ve lived all over the country and MK is brilliant. We’re not moving.
Loads (hours and hours) of singletrack in Woburn, fab road riding in the quiet lanes to the east or west, great running through the parks (I can do a 10k run from my house crossing only one road, and 9.75 k is in parkland, passing the concrete cows), great theatre, music, easy access for shopping, easy access to London (30 mins on fastest train).
As with all large towns there are places to avoid. The oldest estates are tired and have problems. Big new ones, like Furzeton, are nice but can be a bit quiet if you’re single IMO. As stated above, if you’re on your own, go for the Hub.
There’s some real detail in here if you’re keen The estates are ranked in order, with 1 being lowest. Avoid Beanhill…