Hertford, Ware, Hitchin - which one?

So my partner and I are looking to move out of London and move up north to Hertfordshire. Browsing on here + others + Rightmove it seems to me that these 3 towns are the ones that tick the boxes for us. They seem to fit in that "middle bucket", St Albans and Harpenden are also nice, but a bit too expensive, and other areas are cheaper but less nice was the impression we got.

Now we're only early in our discovery of these places but I thought I'd ask here to see what others thought. I'm most curious about how these towns differ - though I appreciate that's a tough question as most would have only lived in one of the three.