I haven't had any desire to use a ND filter. I realize it's a personal thing but I don't care for long exposure landscape shots shot using an ND filter for the most part. I don't like the way they blur the waves on ocean shots nor do I care for the effect on waterfalls. I think the photographs using ND usually take away from the power of the motion I like. I love the spray from waves crashing on the shore.... and the power of a waterfall, without it being a blurred white.
I know I'm bucking the trend/fad at the moment but I see all kinds of "that's an amazing photo" for ND shots that I find hmmmmmm let's just say, not my cup of tea.
So Vinz, if you post a few ND shots, I won't say anything negative..... I'll just avoid comment. 
Kim (the male variety) Canon 1DX2 | 1D IV | 16-35 f/4 IS | 24-105 f/4 IS | 100L IS macro | 70-200mm f/2.8L IS II | 100-400Lii | 50 f/1.8 STM | Canon 1.4X III
RRS tripod and monopod | 580EXII | Cinch 1 & Loop 3 Special Edition | Editing Encouraged