No underwear always works best for me! My skirt is so tight on me it would look inappropriate if you could see the outline of panties so I go without.
I prefer no undies but then there is the dampness issue, at least for me, and the potential for spots. So in jeans it is always none. In a dress or skirt it is either seamless panties or of the skirt/dress is not super tight then a thong.
I work 13 hr shifts. I wear the most comfortable ones that also give me coverage when I'm bent over checking chest tubes/wound vacs/foleys. Boy shorts or cheekies tend to be my first choice.
Thong or gstring at work.
I am a Sales Rep. for a pharmaceutical company. My favorite is a thong pulled tightly into my slit and hopefully wet by the end of the day. As to a bra, either a shelf-bra that barely covers my nipples to be a tease or a soft front-hook bra to afford me easy access in the ladies' room, should I have the need to alleviate the stress of the day.