Staedtler
It’s my view that if you’re going to carry something through life with you, it should be the most beautiful and pleasurable object you can find. That applies to my phone, my laptop, my wristwatch and most definitely my notebooks and pens.
And, here is the other thing about this idea — A tool you love to have is a tool you will love to use. I could not constantly keep a daily journal for more than a few months at a stretch until I found one I really, really, loved to use.