I can't believe that Lamy Safari is still on market. I used mine up to Abitur (German A-levels) and must have bought it almost 20 years ago. By the end of grammar school I found Online Rollerball, which is a ballpoint pen with standard ink and ink cartridges. I still buy the latter from time to time.

As for ballpoint pens, during stays in Japan I accumulated a small collection of multi-color ballpoint pens with extra thin tips, most of them from Mitsubishi. Small sketches and notes tend to look a bit tidier and the thin Japanese pens made for kanji writing are superior for this. Also changing colors is quite nice for note-taking.