Best trend: resurgence of Calvinism
Worst fad:
1.
Christian swimwear for the total body. I think even an Olympic gold medalist swimmer wearing one of these will drown.
2.
Armor of God pajamas. By wearing these pj's and
"with their belief in Jesus and His protection, your little can feel safe and secure during the night as they sleep. As they dress in the morning, they should replace [these pjs]
with the spiritual Armor of God to protect them in their daily activities." 
As atheist professor, Alan Wolfe, from Boston College once said on the Albert Mohler program about Christian marketing trying to evangelize non-Christians like himself:
"I mean, come on! Is that the best you [Christians] can offer?"