A favorite of artists, sketchers, doodlers, and writers, the Sakura Pigma Micron delivers a great experience no matter the use. I have been a little late to the party on this one, but being a fan of plastic tip pens already, I knew I would love it. I chose the 05 tip, which is, at .45mm, near the middle of their product offering. You can choose to go much finer or much bolder than this one. It is very sturdy and the line is clean and smooth in my Moleskine.
The only thing I haven't tested out yet is durability, mainly because I haven't had it that long. If anyone has experience with how long these pens last, please post it in the comments section.