Spin caps are great for night journals, the seconds it takes to spin the cap off provides a time to recap the day. It enhances the ceremonial process.
Snap caps are great for work. The reality is, the time to spin the cap off and adjust the grip is enough to cost an idea or two. The length of the cap counts too, cap of Lamy Safari requires less travel than Pilot Elite; shorter is better.
At work, fountain pens are tools, the more brainless the better.
