I followed a routine... but worked that around Hannah's tired signs. So watched for when she was getting tired and then that'd be the vague time for her sleep every day. Same with food etc. So incorporating the best of both worlds I feel
But generally the pattern was feed for an hour (!!! yes!!!), play for a while, then into bed. Then she'd wake for next feed 3 hours past her last one - sometimes sleeping longer... never leaving her to sleep 5 hours past last feed.