Fountain pen with plastic nib.
This is my current favorite pen for journaling and all-purpose hand writing. I've never found another pen quite like it! Its unique nib gives you infinite options of fine or boldness of stroke, and it has a satisfying, slightly scratchy feel as you write. It's not for those of you who recoil from the slightest sense of grit on the page, but for the rest of us it's just the thing.
Black ink.