I write almost everything I can with a fountain pen, and have for probably the last 12 years or so. I have my nicer ballpoints for using at work, where a fountain pen wouldn't be practical, or on the rare occasions I have to sign receipts or get a hardcopy of the paper for the crossword.
I've gotten the most use in maintaining a journal, which I've done with some regularity since I first bought a Pilot Metropolitan all those years ago. Now that I'm taking another go at university, I've also written all my course with them, which is probably several hundred pages by now. Every so often, I take a stab at writing some fiction, but those efforts haven't really amounted to more than one short story.
I keep a planner, and write letters to one friend on occasion. I've got a very neglected Gemini blog that I would also like to draft out entries by hand in, just to be writing something and publishing it into the void on a somewhat regular basis.