First name and first SIG.
Not a drop of creative juice flows through me.

My friends have called me Jimbo for decades and I shot my first firearm in 1954 hence, Jimbo54.

Jim

First name initial and first half of last name.

Named after my Grandfather, people call him Ron, so I'm Ronnie. Last name starts with D. Fan of both John 3:16 and Austin 3:16.

I spend most of my time at either of two dwellings. One in Ohio. The other in the UP.

Back when the internet was younger, my first venture online was with Yahoo! Pager and eBay. I wanted an address/username that was easy to remember and didn't have underscores, numbers, etc.

This one just popped in there.

It was late and I was tired.

Mine goes back to college in the early 80s. I lived in a house with a bunch of guys and for laughs we would refer to each other as "Cool" - "Cool Dave", "Cool Chuck", "Cool Rich", etc.

Years later, the first time I had to choose a username for a login, I couldn't think of anything else so I plugged in "CoolRich". That username was taken, so I appended '59' and 'CoolRich59' became the username I used going forward.

It’s a Japanese animé mini-series from the mid ‘80s that some consider to run prior to or parallel to the Robotech series. Similar features such as transforming aircraft but a lot more violent.

As an aside, I named my file host URL “SuperDimension” in honor of both.

Back in the early 1990's, Microsoft had an online WW2 flight simulator.
When I first went on there, I got killed with such regularity that I chose the name "Target".
After I started flying Micoroft's Combat Flight Simulator... and I got better, I was asked to join a squadron called XL. I've used the name online ever since.
I suppose it can also stand for Extra Large Target, which I feel like when I try online gaming now.

FlyingScot - after Sir Jackie Stewart. I'm a big F1 fan, but even bigger fan of what he did not just as a driver but to make the sport safer.

His personality is direct, honest and frankly pisses people off - something I can relate to. I'm 1/2 Scotch and 1/2 French and my grandfather and uncles reminded me of him.

I also used to do some light HPDE and autocross and fancied myself a driver. Sir Jackie Stewart - the Flying Scot.

From Seinfeld, an episode (rerun) I was watching shortly before I registered. George Costanza, desiring to pretend to be someone other than his lame self says to Jerry: "Now about if I'm an architect? You know how I've always wanted to pretend to be an architect!" Obviously, because becoming an architect would require way too much effort, it isn't remotely possible to even want to be one. Limiting one's objectives can be a useful strategy. It struck me as funny and I went with it.

Quit boring story actually... "cparktd" was the first work e-mail I had.

The "cpark" was the site location designation. In my case an abbreviation for "Commerce Park". That was followed by your initials.

So it went for example...
cparkrj@xxxxxxx
or
cparkjp@xxxxxxx
or
in my case... cparktd@xxxxxxx

When signing up at places years ago it was the first thing I thought of that I could remember... should have thought on it a bit more.

It's my name.

P250: Joined to research a bit on the P250, which I ended up not buying.
UA5: Chassis code for the 2nd generation Acura TL that I was driving at the time.

The place I spend as much time as possible and my favorite gun brand...

Smith Mt. Lake, VA (SML).

I've never felt like the master of anything, but I like to learn.
There is also a Star Wars angle to it.

from a time I was just learning about Sig as I began introducing my tiny reptilian tail-brain to a larger notion of Rational Thought...

I hauled heavy road construction machinery for years. Now I drive an offroad mining truck that weighs over a million pounds loaded, a Komatsu 930e. If anyone is interested. I am in one as I type... I started using this name years ago, before here, wanted to use hvyhauler, but it was taken.