I'm obsessed by pens and always have been. There was always a quest for the perfect pen until I found the Pentel EnerGel. Their .7mm metal tip is literally pen nirvana for me. The silver pen is a metal barrel because I love EnerGel so much that I was willing to invest in a quality version.
However, that's the .7mm. I'm less excited about the smaller nibbed EnerGels because they are needle tip and scratchy when I write.
I have a collection of smaller grid notebooks now that need smaller tipped pens. I have begun the quest to find my perfect .5mm and something smaller, maybe .38mm or so.
The Ink Joy in black is perfection in .7mm. I don't care for their purple or other ink colors, but I do love the black. I tried their .5mm nib and it's okay. I don't mind it. I can write with it and not become frustrated. But I'm not in love with it.
The Zebra Sarasa is nice. It's another .5mm nib. It's a little scratchier than I'd like, but I maybe could live with it. The problem is that clip comes up over the start of the clicky thing that lowers the nib for writing. My thumb keeps getting caught on it and I have to maneuver around it to use it.
I do like the Uni-ball Vision Elite in .5mm. It's not scratchy and I love the fine point on this one. It would be my ultimate choice except that it's a little slow to dry and I've smudged pages even after waiting what should be a sufficient time for it to be dry.
Of my choices (so far), I think I'll stick with the Uni-ball Vision Elite and the Paper Mate Ink Joy. I might do more experimenting for the .5mm pen later, but these are good.