One of the things I love about Fuji cameras is the small size. But the smaller size and packing the back with buttons can sometimes be unwieldy for those with large hands. I use Lensmate thumb grips on all my Fujis--XP, XT, XE. Improves handling significantly without adding bulk. Gives the thumb a place to rest without pressing buttons inadvertently. Works for me but others may prefer fuller hand grips.
One note--I've used cheap generic model thumb grips before settling on Lensmate models. I personally like the Lensmate better and I can justify its higher price. Never tried any of the other higher priced brands.