Nothing super out of the ordinary, but wanted to show off.
Thinking I need/want more lighter colors/patterns in the collection. Been contemplating a Duragraph for a bit, but I can never decide on a colorway.
Top row: Lamy 200 (EF), Birmingham Model C (M), FWP Joule (F), Pilot VP Decimo (M), Kaweco Brass Sport (F), Monteverde Invincia (M), Parker 51 “Special” (F?), Kaweco Frosted and Skyline Sports (B and M), Asvine V20 (M), Lamy Safari (M), SimplPens (F), Waterman Allure (F), Pilot Metropolitan (EF), Parker Jotter (M), Kaweco x Moleskine Fountain Pen (M), FWP Carousel (F)
Bottom: Pilot Kakuno (F), Hongdian Forest (F), Jinhao x450 (swapped w/ a 1.1mm stub), Jinhao 82 (M), Jinhao 51As (F and EF), and an obligatory Platinum Preppy (M).
Missing: TWSBI Diamond Mini (F) cause the damn barrel cracked again, the plunger got lodged in it while I was disassembling it, and I have to shatter the (thankfully already-broken) barrel to get it out.

Which one you use the most
Probably a tie between the 2K, the Birmingham, and the Metropolitan. The VP and the Kakuno are very new, so I haven’t had a chance to really get to know those yet.
Cool! How do you like that Birmingham?
It’s a great writer, a little wet, though not nearly as in so as the Lamy 2K. Excellent weight and feel for my big hands.
Biggest complaint is that the cap doesn’t have the most positive stop (it’s a screw-on) and it doesn’t post super-well, but those are mostly quibbles.