I think "It Depends" is about the best answer that you can expect. I don't think there is a "right" there is only what looks best to you. You either trust your natural artistic impulses or you don't, if you don't, let Lightroom or PS or whatever choose it for you. I leave my camera on auto WB because I shoot Raw so I can change the WB later on to whatever I like the best. I find lately I prefer a warmer look for portraits, but it depends on what I'm shooting and what the mood is. Your taste will evolve as you grow as a photographer and as what you're shooting changes. I'm an advocate for shooting in Raw and then choosing your WB later on in post.
Edited to add: Actually, after I hit "Post" I realized that the "right" answer is probably to shoot a white/grey/black/skin tone card with every shoot and calibrate from there. You can still get artistic using the WB but at least you'll have a true baseline to go from. I'm mega lazy, so I don't do this.