I lived in and commuted to London, Euston from Baldock and Hitchin areas for many years.
ONE big tip. You have a much better chance of getting a seat on the train from Baldock, as its one more town out just as the seats get rammed full.
The trains along that whole line are not great currently due to train company adding a impossible to follow new schedule and routes, but as a town to live and commute from its good.
A bypass means the traffic is quieter nowadays…and its very family friendly with many good houses and a very good senior school.
generally the villages around are all good… just think about when it snows and you are stuck trying to dive everywhere…. when living in Baldock or Hitchin you can walk to a large supermarket, pubs, cafes and restaurants.
best parts of Baldock to live…in the actual town…historic buildings etc or newer builds.
Clothal common is considered not part of the town by most.
good luck and hope this helps