I use both....not in the same space, but I just like sparkle so some areas of my home will have white lights, some will have multi-colored and others will have solid color. For example, I have a cat shape wired decoration that has pink lights and sequins, she sits on one of my side tables. I'll put a string of red lights at the end of the hall upstairs, in the "little nook" with a few decorations. My tree has white lights, although, no tree this year...I'm being creative this year because of my new kitties, but I will be using white lights. And I have multi-colored lights for my windows.
I have blue and white lights on the TWT. We have colored lights on the living room tree.
We have an assortment of lights, too. Some flickering flames lights, bubble lights, etc. And light covers.
Color for sure. I bought a pre-lit tree in a local auction and they were white lights. I never plug in the white lights and just use my colored LED lights.
White lights, no doubt.
Although we used to have an LED strip in ours, so you could change it however you wanted. That was kind of cool, just having it on an icy blue or something