Sidney, your answer it pretty much what I would respond to. The only caveats I have are regarding "shimmer" inks with glitter/mica particles. I use them rarely and in easy to clean pens, but a lot of the newer fountain pen users are drawn to them and often run into clogging issues. Pens just weren't made to handle particulate matter that way, so you have to be hip to that issue.

But it's true - it seems like the growth in inks is exponential, and there are a million eye-catching inks today. I've got my Watermans and Sheaffers for my vintage pens, but lots of moderns to play with the rainbow.

Cheers,
Jon