Males are too limited and just provide a plain shirt and some random jeans/sometimes shorts. Especially, because maxis clothes are so basic and for females never fit the figure right. Clothes are a close second, because I would absolutely hate to see my sims without cc clothes.
And each of my creations has a unique look. it gives a more interesting and dramatic flare to how my sims look.
I like to use the skin details custom content the most.
