Welcome - loved Hadrian's Wall, always enjoyed reading about Roman history so walking past the forts and watch towers was brilliant. Retracing the footsteps of the legions from 2000 years ago and all that. Ended up doing it in November during a cold snap, was a beautiful few days.
If you want to get back in to some of the hilly stuff - I do believe there is a good 'rambling' group which does some north pennines routes typically ran by Mike Knipe (chap who runs an outdoor blog and who used to post on this forum I believe).