My first two gaming PCs in high school had a side window and blue cold cathode light. My next build in my early 20s I decided that even this was too garish and went to a simple brushed black case. I understand that cheap tri-color LEDs mean fewer SKUs and infinite custom colors but in practice many people never turn off the "demo mode" color cycling and it just looks ridiculous.

Then again I'm typing this from a Thinkpad - maybe that says something about my aesthetic preferences for computers.