Most books set in England between 1800 and 1840 have a 'Regency' feel. The reason that era is so useful for romance authors stems from the wide-ranging social changes that were occurring over that time, and the parallels, or echoes, those create with our time and the lives of our readers.
Love wasn't a happening one decided on---to indulge or not, to partake or not. To feel or not. When it came, when it struck, the only decision left to make was how to respond---whether you embraced it, took it in, and made it a part of you, or whether you turned your back and let it die.