Thanks for the answers so far, y’all!
I know from experience that Latter-day Saints are austere and strict, but there’s a large part of the Church that’s inactive.
What impresses on my mind is the fact that many congregations - regardless of whether this applies to the denomination or not - are moving away from “worship the Lord and learn” to “worship the Lord and be entertained.” I know The Church of Jesus Christ of Latter-day Saints, and I am sure most of the Churches mentioned herein, are no afraid to wax long on admonishing its membership on obeying and being faithful to the rules, standards, and requirements of the faith. This may be anything from witnessing to observing dietary, financial, or moral codes. Many of the more modern congregations I have attended seem to be more general in their messages, something that would appeal to the greatest number of people rather than the old time’s preaching and exhortation and admonishment. It makes sense, too. These days people are less motivated to donate to a religious cause whereas, it would seem, before it was considered a given. Churches with unpaid clergy, such as the Primitive Baptists mentioned and The Church of Jesus Christ of Latter-day Saints from my experience, are more able to be strict in their requirements and standards.
Nevertheless, I think that this trend, although diminishing, will continue to endure. Just as people want to find a congregation where worship is uplifting and the message instructive, others will find a congregation that claims to be strict, faithful, unswerving, and constant, especially when materialism and relativism increases in prominence.
I had no idea that Prebyterians used to be so strict. Then again, I have been to only one Prebyterian service (probably PCUS).
Of course, the two main wings of modern Christianity, Catholicism and Orthodoxy, cannot be discounted, as others have mentioned before. Both cherish Tradition, which means being faithful to what has been handed down from before without change. How successful they are in doing so varies on what resources are available to them (especially in terms of size of congregation, activity of members, how supportive members are of the Tradition).
I would like to hear more, especially about Calvinists. My understanding of them is probably flawed. I had read about TULIP before. But the impression that I attained was that Calvinism was austere, believed in total predestination (everything that happens has been willed to happen by God, including the choosing of the elect), and the remoteness of God vis-a-vis humanity and its mentality (thus, we cannot judge God or His attributes: God’s justice is absolute justice, even if may not seem that way to us). My understanding also is that although more prevalent (evidently amongst Reformed and Prebysterian/Reformed Presbyterian Churches), their influence has diminished considerably now. (Although perhaps the work ethic has gotten stronger?)
WRS - Rambling, that’s all. But I love what’s been said so far!