Does anyone have any good ideas for fun little things I might be able to 3D print to improve the look of my PC? Like, cable combs, for example.
Ram module covers, fan brackets, gpu support, you could try and do a vertical gpu mount like cable mod's. That's all I can really think of that hasn't been said.
I just thought of some more by looking at my own build. Corsair h100i has a plate on the block that says corsair with the led, you can print your own plate and have it say something else. Phanteks p400 has optional HDD brackets, instead of printing an HDD bracket you can create your own design for an SSD mount and have it vertically.
PSU shround, GPU backplate, motherboard shroud.