Honestly, my first though in response to this was huhwhosawhasitwhaaaaa? ;D :D :o
No worries. RGB lighting has taken over much of the enthusiast market. People put it in *everything* now including internal connector cables (I mean, wut?). So rave dance lights that are also computers are definitely out there to buy.
For me personally, size really leans towards wanting a LARGE screen laptop.
17 inch laptops are much more limited; 15 inch seems to be the market sweet spots, but you can certainly find them around. Both primary links (Dell and Xotic) have large screen laptops. For thin-n-light (usually less flashy), there are a few. Razer has one, my own manufacturer, Gigabyte, has one in the Sabre series, MSI has the GE75, and quite a number of others.
As to "bling", if you mean outward appearance then NO. Basic appearances or subdued is fine, so long as what's under the hood is a beast.
I'm reading that as "I don't mind bling, but I don't need it" rather than "ew ew ew, no want, get it away from me" so there's some of these models that have pretty dance lights if you don't mind them. If you must have a business style 17 inch that games, the pickings will be a little bit thinner.