I found web sites belonging to an interesting denomination, the Brotherhood of the Cross and Star. This shows what extremes can result when believing in the Trinity.
They believe the 3 persons of the Trinity are reincarnated in a family in southern Nigeria. They believe you have to wear white robes all the time. Wearing wristwatches is a sin (because it's jewelry), weeping is a sin (they have an article on why Jesus wept, because it was allowed before he was crucified!), going to doctors is a sin, eating meat, fish, eggs and dairy is a sin. Three times a year you have to fast totally for 72 hours, not even water is allowed.