Default skin is not that bad :O I've used it for 5 years. Although default skin performs poorly to many custom skins if your room has bad/screen lighting due to lower contrast.
i'm using default skin too. but with slightly different colors. http://bit.ly/2AmkDgD . yes, blue pears or yellow grapes aren't as realistic as the default colors, but imho it's easier on the eye than the flashy default colors