My three are definitely not on many people's lists, but I have quite a few blacks and these three have more... personality.
If you want a black that actually shades a bit (which I'm guessing you do not) then parker quink black is actually pretty fun. No other black I have will shade unless you're really screwing with it, and this is also a nice royal blue undertoned, giving it a little more vibrancy to my eye. It's also like $6, so if you don't like it, give it to someone.
If you're willing to clean your pen every month (unscrew the nib section of the 2k, pop the feed out and run it in an ultrasonic cleaner with regular water for 60 seconds. If you don't have a $20 ultrasonic jewelry cleaner, you really, REALLY need one. Mandatory fountain pen enthusiast tool.) then my favorite is hands down platinum carbon black. I've NEVER had a clog with it, despite it being "pigmented" and I have had an eyedropper converted preppy F filled with it for six months without cleaning, it starts every time. I've also filled a noodlers nib creaper and left it for a week, and it clogged dead (cleaned away super easily, so it was no problem, but it does not like a nib that is badly prone to drying out, which all non-ebonite noodlers pens are)
The cool thing about carbon black is that it's a seriously dark black, but when it dries, it sheens silver, like artist's charcoal. So it has this shine to it on top of being super black and waterproof. Just lovely.
A similar, but not as dramatic (and not as fiddly) ink that I think fits the retro design of the Lamy 2000 is my personal favorite black, Noodlers Dark Matter. It was an ink that was mailed to Nathan Tardif, that was confirmed to be a bottle of the very ink (a special formulation) used at Los Alamos during the Manhatten project. Nathan reverse engineered it perfectly, so it has really vintage levels of waterproof (some, but not perfect) and it will age just a bit over time (also cool) it also has a mild silvery sheen similar to carbon black. It's also a CRAZY wet flowing ink, perfect for the EF Lamy (I use it regularly in my F nib pilot metro as a daily beater pen while on duty, since my patient charts get rained on) and a snap to clean, doesn't feather hardly at all on the cheap paper I use at work, has that silvery sheen even on the cheap paper, and is a black-as-night black.
If you're boring, heart of darkness. I have a 4.5oz of it that I give away in sample vials to anyone that I give a pen to (or convince to buy a pen for themselves)
I personally don't love blacks without character. In legal documents, you actually want a blue or other highly visible, saturated ink with color, because it stands out on the paper as a human notation, and when scanned (most legal scanners and copiers are in black/white) you can then readily pick out the original.
My patient charts are scanned regularly, and I actually have taken a liking to baystate blue in my F nib metro (an ultrasonic cleaner makes the whole "make sure it's clean" thing irrelevant) since it is mega waterproof and is just eye searing.
Edited by Honeybadgers, 22 June 2017 - 02:32.