In all honesty, the only gecko trend that I have noticed is that when I first started in this hobby, Leos were extremely popular, now as time has progressed, they have competition as one of the more popular geckos as Crested Geckos are sneaking their way in. I don't see a lot of Fat Tail Geckos anymore which is a real shame.
I don't really know much more, I'm not a lizard girl. And welcome back to the site
Jenn