I would think that for what you’re looking for, white is better. You say you like to switch up your tree-- well, you can do a lot of different, custom “looks” with white (meaning the white light will REALLY play off of whatever ornament/tinsel theme you do), whereas the multi colored lights will always have a similar look.
Coloured lights! 
Maybe just because I always grew up with them. But I like the different pretty colours and how they reflect off of garland and such.
White, with half steady and half blinking.
Or, if you have some time on your hands while watching TV you can do what I did with the outside lights: buy a strand of each color, and remove every other bulb from each strand, then swap them. It only took an episode of ER to do both 100 bulb sets (mine are now green and red, ftr).
colored and blinking. LEDs do not yet blink properly. My latest string has only one in five that blinks.
I chose other because my preference is complicated.
I prefer colored lights. I love colored lights. I think white lights are boring.
HOWEVER, in my house, white lights look better. We had a real tree with colored lights last year and it looked kind of blah. We have an artificial tree prelit with white lights this year and it looks awesome even without being completely set up (we put it together to make sure it was all there and worked but that’s it. the branches are all wonky and it has no decorations).
So, I’d say go with what looks best in your house.
I abhor white, normal lights are white why do you want your tree the color of streetlights?
I like the look of all blue. But we traditionally had a mix of colors. I do not like just plain white.
I usually twist the white and multi-colored lights (smallest bulbs I can find) together. I don’t like the all one color look. A place down the street from me used to light their whole property with red, and the effect was more ominous than festive.
Other.
I like to change it up often, making a pre-lit tree a bit of a problem. The light strands are cheap, so I have several white and several multicolored hanging around to use depending on my mood each year. I also have big old-fashioned lights and strands of small LED bulbs. All of them give different looks - I don’t want to buy a pre-lit tree and be tied down to one thing.
I don’t like the LEDs on the tree, though. Tried it once and found it looked funny because the colors aren’t quite right. I use them in the windows instead.
For the tree definitely coloured. Outside the house I love the look of one colour (red, green,blue etc) + white. The two tone look is very pretty
I have two sets of tree lights, one white and one colored. I go with whatever strikes my fancy in the particular year. For a long time it was white, but the last two years have been colored and I’ll probably go that way again.
Whatever set I don’t put on tree, goes outside the house.
My wife likes white, twinkly lights, and they do look pretty. I’m a colored light guy, but not so strongly that I would take away the pleasure she gets in decorating the tree the way she likes. So, for the 25th year in a row, white lights it is!
I like tiny white lights, it looks elegant. I don’t dislike tiny colored lights, though, so it’s 50-50. Either is good with me! I’m easy. (Just don’t put up one of those heinous inflatable things on your front lawn or we’ll be obliged to finger-shoot it when I drive past.) I feel, too it depends on what your house looks like. Do you have kids? Do you live in an old house, is it well-used and kind of messy and cluttered, all kinds of furniture, knick knacks, silk flowers? Colored lights! … Do you live in a sleek modern place in neutral colors, modern and uncluttered, the type of place where you can have an adult cocktail party vs. a Christmas scavenger hunt? Then I think white lights are more appropriate, colored lights seem to be trying to hard, if you know what I mean. They kind of clash.
Multi-colored, huge, flashing and trashy. 
Halloween is for cheap crap. Christmas should be classy. White lights.
Colored lights that twinkle are my favorites.
Colored lights are bright and cheerful and happy. White lights are somber and consistent. Christmas should be the former, not the latter.
And while we’re at it, the ornaments should be eclectic, consisting of things people have given you and souvenirs and things your kids made (or that you made, if you don’t have kids yet) in kindergarten, and so on. Theme trees covered entirely in uniform matching ornaments are for the displays at the mall, not for families.
Right now, white, because the other decorations are intended to be the focus, and too many colors would overpower them. Eventually I’ll get bored and move on to something else, and probably colored lights into the bargain.
I grew up with white. For a long time my Christmas tree’s decorations were all gold, so white “went” with them.
Now, to go with our swanky retro-mod house, we have a swanky retro-mod white tree with vintage Shiny Brite ornaments in all different colors. The lights are still white… the ornaments add plenty of color, thankyouverymuch.