Here's the thing, performance over aesthetics any day!
But I want my parts colors to match. I want the inside of my case to look neat and clean. I'd rather not pay extra for RGB.
If you have a windowed case, you'd at least want it to look clean inside. It doesn't need RGB bling to look good but I want my GPU to match colors with my mobo and fans and RAM.
And personally, when it comes to RGB, all or nothing.