I love these letters because of how light and cheerful they are to look at. The thin and thick lines add a sense of stability with room for play and goofiness without being over the top. It is the perfect amount of seriousness and playfulness.
I enjoy color palettes (I guess these are warm earth tones?), but I also like hot pinks and brighter colors. I'm not super into or early color palettes. I have a pink bathroom. I am not afraid of color.