Not nearly as cool as the stuff some of you guys are posting here, I am jealous of both your style and ingenuity.
I built one a few days ago after a few years of having the same machine, that one stayed mostly the same minus the CPU and GPU upgrade over the course of 8 years, so it was time to splurge a little bit, especially since my kids are a bit older now and I wanted them to have the cool memory of building a PC with their dad, even if they mostly ignored me and just posed for pictures then went back to doing whatever it was they were doing.
This is my favorite case and I had been wanting to build on it for a while, I am 42 but I never outgrew the red and black color combination for anything, they are still my favorite colors and I wanted them to be the theme throughout the case, the problem with this case is that the massive RTX 4000 cards, such as the 4080 or 90, with their massive coolers, do not fit, especially if you want to use the vertical bracket to show off the fans, not only does it not fit on top of the bracket but the weight of the card is so much that the bracket would bend and eventually break, so that's where some creativity had to happen. I had some high-resistance zip ties that I didn't use for an electric bike I assembled, I used one of the posts of the case to hang it from the other side and floated the card just enough so that there was room under it to connect the riser cable but not so much that the ports wont be usable on the back.
Another piece of modding that I like o do, if it counts, I've always relied on wake on LAN, I like the ability to turn on my computer wherever I am, even inside the house, but WoL is not very reliable, depends on your ISP if you will be able to use it properly or not, I changed ISP a couple of years ago from one that had a public IP to a shared IP and all my WoL super powers disappeared, while there are ways around that (tunneling, etc.) it's not the most elegant/stable solution, plus depending on your mobo, if there's a power outage in your home, WoL won't work when the power comes back on, you would have to manually turn on your computer once before WoL works (some mobos only)
So I use these for many home automation things around my home, its basically a small square-like device you glue to a surface and it pushes things at your command, light switches, thermostats, etc. it connects via wifi and then you can control it with siri, alexa, etc.
I stuck one of these right over the button,
https://www.switch-bot.com/
just as I had with my older pc, and then configure the button push to match the pc perfectly, so no matter where you are in the world you just have to go "hey Siri turn on my computer" and it will be like someone is manually turning it on for you, instead of having to go through the WoL nonsense that has historically always been a pain in the butt for me.
Another interesting thing that took me a while to figure out was the RGB, I had this idea that I wanted red light to start from the left and sort of travel from the keyboard and the monitor to the mouse then the mother board, pump, ram, cooler, etc.
The problem is they are all different brands, keyboard corsair, mouse Logitech, display dell, mobo MSI, etc. There is software that is supposed to detect all your rgb stuff but that wasn't working properly for me, so it took some tinkering and creative synching in other to get that effect more or less the way I wanted it, it was obviously not perfect but it worked out well, it was the dell display that ended up giving me some serious pain in the butt as the alienware software does not control the rgb lights on the back of the monitor so it has to be done with the monitor buttons, which normally would be better except every time the monitor went into stand by and came back the lights reset to their original color. Apparently it was some windows feature causing this, took me some googling to figure that one out.
Anyway, in the end it all came out pretty cool, please do not stop uploading your machines, I don't post in this forum often but I come a lot and love seeing what you guys do.