About a year ago, I switched from technical liners to fountain pens for the bulk of my writing. It started with picking up a Platinum Preppy, and Jennifer giving me a Speedball set for my birthday. I now have quite a few, with different inks and purposes.
Many of them I use largely to write in my notebook; analog productivity rituals are important to me. Most of the ink reports here are on the paper in a Leuchtturm1917 notebook, my primary notebook for both work logging and personal journaling.