I like to be comfortable, for sure. But there's more to life than just comfort. Advancements, toys, and gizmos. There's a quality of society and the world around you that some of us think is more important.
I'd like to go back to almost any time before now... with the exception of maybe about 1914 through 1945 or so.
My own period of interest is mid to late 18th century, and the Revolutionary War period.
