I recently got a bottle of Noodler's eternal brown which has been quite nice and survived a dunk test just fine.
One interesting aspect of the ink though is that it is very comforting to me to know that my writing is not going anywhere. There's just something about the writing being truly permanent that creates a feeling of safety or at least that this is real.
Maybe this is just because of personal insecurity but it's still interesting. The only problem is that now I hate to use my parker quink or any other non-waterproof ink because it lacks this permanent feeling.
Anybody else notice this effect?