I've written on Cross since middle school (1980s)..

7, easy spitball shooter

Probably 2, 6, or 7. I've always loved the V5/V7, but the liquid ink is messy, a bic is a classic for a reason, and the PaperMate flair has been my go-to felt-tip for a long time now. Though, the ultra-fine version is much better for writing than the medium one.

Pilot G-Knock 1.0. G2 barring that.

If 6 is the Papermate felt tip, then that one. I like the static tip. Otherwise, probably 3, the upstart Sharpie.

It's 2 for me, always so reliable and write very clean

If I had to choose one of these, 4. (I can't see a whole lot of detail in the image. Looks like a Uniball.)

But my preference is my Uniball Signo click pen, with micro tip. Love that precision. No cap for me to lose. And I will lose it.

I use a Lamy Studio to write, so close to a 6.

Also in my arsenal is a Parker Jotter and a Moonman C1.

3

The real solution is to find a parker compatible chassis that has the right shape, feel, and weight for your preferences. Then simply buy parker refills of your choice. Energel .5 is pretty great :)

Another vote for 5, 0.7

Like those Zebra Sarasas, the blue ones are perfect

The good ol' BIC G2. Phat fucking lines, I've never had one clog, they're comfortable to hold and fun to take apart and put back together again while you pretend it's a gun.

For finer lines, though, I'd want a Sharpie (and not the one shown here). I don't know the model of the pen, though. I basically only ever have them if I happen to find one on the ground 🤣

I have an entire note taking program calibrated around the ink colors of 5. I kinda dug myself that grave though. They are at least decent pens.

Also you can mod them into pen guns. Shooting works better if you replace the ink though.

What, no papermate inkjoy? Cheaper than G2s and they fit better in your hand, unless you are gripping it with clubs.