I think your writing style needs to suit a fountain pen.
I used to use a Parker 'vector' fountain pen all the time during school. Now I find thin fibre tip technical drawing pens suit the draw+mind map style of writing now and the majority of long drafts are written on computer.
I write a lot of notes when researching, and the Mrs brought a Mont Blanc 'Starwwalker' at xmas but at that price I don't want to damage it by leaving it around or writing notes. It's more for special writing.