Collecting fountain pens... well, there's a derriere for every seat, as they say. Do you collect for fins?
Color is key....
I'm in a bad way...since I started this, I've picked up a few more pens....a low end Waterman, and what I hope will be a nice Parker 51 pen/pencil set (teal blue). That should compliment my gray Parker 45 and the burgundy Parker 51.
Color is useful for me with multiple pens....
Black/gray pens get black ink
Blue pens get blue ink
Burgundy pens get red ink
I also have a cheap green Hero on the way, so we'll see what ends up in that one.