What matters most for pen comfort over a long writing session?

[benjiwrites]

I've started taking longer notes with a fountain pen, and I'm noticing the grip shape more than I used to. I haven't worked out whether weight or balance matters just as much, but a pen that feels fine for a few lines might feel different after a page. What do you notice first?

[passportpages]

Grip diameter and shape are what I notice first, especially if they make my fingers pinch. Weight and balance become clearer over a page; trying the pen posted and unposted can change how it sits in the hand.

[sarahplans]

I notice if I start pressing harder or tightening my grip as I write. Staying relaxed through a page matters more to me than feeling comfortable for the first few lines.