I write almost exclusively with fountain pens.
When I began using fountain pens again after more than a decade since college I started with this. It's not a bad pen, but after extensive use it's pretty worn. Parts of the matte texture are now smooth, the clip came out on one side so I remove it, and the cap has needed a lot of small hacks to keep functional. I don't use it anymore; at some point I'll pull the nib and discard the body.
1.9mm Stub nib.
My second Lamy. The clip also failed on this, so I removed that. Otherwise it's still in good shape, though I don't use it currently (the nib is too broad for daily use). I'm thinking that I should move the nib from the Safari to this and use it as a desk pen.
This is my smallest pen. It's also the one that I always carry. It's so tiny when capped that it's essentially unnoticeable in either my pocket or a bag. The broad nib is nice, it writes pretty wet, and is very smooth.
I've had (and given away) quite a few of these. They're a great size, pocketable, and mostly work well.
Pilot Vanishing Point
The most expensive pen I have purchased to date, I use this almost daily. It's infinitely practical with trivial deployment, a wonderful nib (gold), and decent durability.
I do have to periodically clean the opening area to remove pocket lint.
A gift from Kiyoshi; I really like this. The design is nice, the faceting catches the light when I'm writing, and the nib provides a nice amount of line variation. I use this with R&K Salix.
I keep this in my desk at work and use it frequently.
Aurora Hastil Ecosteel
This is the newest (and oldest) pen in my collection. Also a gift from Kiyoshi, this pen's history dates back into the 1980's. It's design is simple and understated. It writes smoothly. I love it. This is my go to pen when I'm at my desk working.