I have a similar setup, including the A5 notebook and fountain pens. I alternated colors for a while, but lately I've taken to using a stub nib with flamboyant ink to make a header for each note (meeting / subject plus date), and a big piston-filler with an extra fine nib and a more sober ink for the actual contents. I'm far too lazy to keep a table of contents, so this makes it easy to leaf through and find what I'm looking for. Plus I rarely have to stop and fill pens.
Sounds neat. I don't keep a ToC either, but I write titles to my notes, too, so I can leaf through the notebook to find what I'm looking for. I also flag the notes of high importance.
I keep too many pens inked to switch to your style, because I have many pens and many inks I like. :D
Oh, agreed, it's hard to neglect a good combination! I definitely rotate pens and inks over time, with the general rule that broader nibs and brighter inks are for headings, and finer nibs with more muted inks are for the bulk of the text. I had a problem with ink drying up when I had too many pens going at once, and I cut back :)
