Continuing the theme of liking inks I shouldn't and disliking those I should, I (a firm believer in permanent and water resistant inks) love with this ink. It is silky smooth, has a perfect amount of blue to the color (I prefer violet leaning purples) and is so vibrant I could kiss it.
It also becomes illegible if you so much as drip condensation on it from a frosty beverage.
I'm not sure if I could live with this ink, but I like it an awful lot. My perfect purple would be this color, but with at least enough water resistance to leave me something to trace. I ended up ordering Noodler's North African Violet to fill that role. It's not a perfect match and it doesn't have the silky smooth nib feel of the Waterman, but it is a vibrant purple with strong water resistance.
This is a Goulet Pens exclusive. I admire the sentiment behind the ink, and (like other Eel inks I've tried) I like the writing quality, though (as with the Cactus Fruit I mentioned previously) it can disagree a bit with poorer quality paper. However, the color...isn't what I expected. Much more toward the red side of purple, and just generally...missing something. It's all right, but I don't need any more.
How exciting can grey be, right? It's basically just black with some light shed on it. But I like this ink. I find it soothing. It is a rather true grey--DIY chromatography (dripping ink on wet paper towel) doesn't reveal much if any other color in the mix. Really, it looks a bit like pencil might if pencil was liquid with shading. And maybe that's why I like it--that and the fact that it's one of Noodler's "Bulletproof" colors, waterproof and fade resistant, and very well behaved even on pretty crummy paper.
Being as how I have so many other business-like inks already, it doesn't quite make the current wish list, but I don't rule it out forever, either.