Two of my favourite pens are here: the Twisbi ECO and the Zebra Sarasa.
If you're a regular, gel pen user, I'd really encourage you to check out Zebra Sarasa pens. Some folks think they're a bit scratchy, but they're way less scratchy than the Muji pens I've tried and they write consistently and smoothly.
I started using fountain pens in an effort to reduce plastic waste (and because they're cool), and of the many, many pens I've tried, the Twisbi ECO is heads and shoulders over the rest. It also is quite affordable.
Word to the wise though, skip the TWISBI GO, it looks similar to the ECO and is cheaper, but I've found it to be a disproportionately worse experience.
I have both the Twsbi ECO M and ECO F, and the sweet spot is the ECO F. You just have to gently press the nib on a piece of paper a few times (deforming it ever so slightly to slightly separate out the tines), and the flow will be between the M and F.
If you're a regular, gel pen user, I'd really encourage you to check out Zebra Sarasa pens. Some folks think they're a bit scratchy, but they're way less scratchy than the Muji pens I've tried and they write consistently and smoothly.
I started using fountain pens in an effort to reduce plastic waste (and because they're cool), and of the many, many pens I've tried, the Twisbi ECO is heads and shoulders over the rest. It also is quite affordable.
Word to the wise though, skip the TWISBI GO, it looks similar to the ECO and is cheaper, but I've found it to be a disproportionately worse experience.