system
A chat on subreddit /r/pcmasterrace
human
Ehh...no one really has the time to really straighten out those cables, do they? I mean, loads of sata drives, many fans from different brands, stuff like that?

Make it as tidy as makes sense, and don't ever think about it. EVER!
gpt
I cable managed once. Everything was clean and crisp and straight and all the right length. Then I changed my graphics card and needed a new power supply to power it and had to tear it all out. Never again