@freemo I have a #3776 Century (F tip) from Platinum, it's the cheapest model (~100 USD). I started using it since high school and now I still use it.
I'm not a fan of collecting pens, but I do like using pens since I don't need to swap the cartridges (the Gel Pen Refills). This pen works very well. Before that, I was using LAMY (also the cheapest model, about ~20 USD), but it had a lot of problems and I eventually decided to invest more.
I like using carbon black ink, however it's not good for pens, especially when you don't write a lot. But this pen handles it pretty well.
But now I rarely do handwriting after graduated. I don't know if this is good, but the ultrasonic cleaner is pretty good at dealing with dried carbon ink.
@skyblond its a richer dark, but it is also more permanent. If you write with flex fountain pens it is also very much superior when it comes to not "railroading" (when a flex stroke breaks the ink film and creates 2 lines instead of one thick one).