@unattributed the ones I keep coming back to are J Herbin Larmes de Cassis, Waterman Inspired blue, Sheaffer Skrip Peacock Blue, Diamine Soft Mint, Pure Pens Pendine Sands, Diamine Passion Red.

@unattributed I have a large variety, and truthfully it doesn't hurt to have a wider range, however I have reached the point where I have some inks I reach for again over trying something in my collection I've not yet used. I think part of the problem is that I only tend to have a few pens inked at once, and the fact that I nearly always keep at least one pen inked with my favourite colour ink.
http://www.fpc.ink/users/92824

@timelordiroh perhaps it might be worth seeing if you can meet someone at a pen show etc that had one you can try. After all, there is no replacement for actually holding a pen to get a feel for it.

@timelordiroh I mainly got this one because of the ring top option and the fact that I could customise it by mixing and matching parts. Standard is all one material, with about 5 different options. coincidentally they are having a sale at the moment with 20% off.