My PC sits alongside my desk. On the right side. So any windows would be blocked by my desk. I have never built a system with lights, lighted RAM, lighted power supply, whatever. No one would see it, and I'd rather spend the money on something that actually improves performance, or life - step up to the next grade of power supply, or the next faster CPU or RAM instead of spending money on all the flashy bling. To me it's like the good old ricing out of economy cars. Loud muffler tips, underbody lights, fake hood pins - none of that makes you care faster or handle better.
These plastic covered motherboards remind me of modern cars. Lift the hood and you don't see an engine, you see a big pile of plastic. I'm tempted to remove it on my car. Frankly, it looks stupid. I want to see the go, be it a car or a motherboard. Though I seldom "lift the hood" of my computer - I'm not always tinkering with it. Once in a while I'll upgrade a component until it's time to upgrade the whole darn thing - current rig is 7 years old but I've upgraded the disk twice - first to an SSD, then to a bigger SSD, and I upgraded the GPU once. I have some extra memory to take it to 32GB but I just haven't gotten around to it, and nothing I do has so far really stressed the 16GB it has.
Even if I was into overclocking and eeking out the best performance - I'd still rather spend my money on a better power supply, better cooler, better components on the MB, than flashing RGB lighting and all those things that do absolutely zero for overclocking.