The Uni-Ball AIR rollerball pens. I love how they look, how they feel in my hand, how they write... But I have only ever bought one. And I almost never use it. Because it bleeds through paper more than any other pen I have outside of alcohol markers and some of my wetter-writing fountain pens. It doesn't work well on resistive-surface washi tape, even, it just smudges.
I love these pens but they are SO rude to me.
