Haven't seen Regency House, would like to though. Loved Pioneer House. Really showed how tough it was back then.
My favorite was Manor House, showed the very rigid class distinctions (Victorian era) which were pretty hard for them to swallow. They put them into their historical positions based on what their jobs/families were in today. It was like a living Gosford Park.
I really liked Manor House as well (Gosford Park is one of my favorite movies). These series seem to work best when the participants accept the historical parameters. Pioneer House, Manor House both worked because the people "bought" into their roles. The show with the family from the 30's in England fell flat as well as the pilgrim series. That one was especially exasperating because a couple of the women participants would not accept the role of women in 17th century--it was so frustrating to hear them complain about their role in society and how they were not going to go along with the premise...duh, you signed on to be a pilgrim, what did you think you were getting into?