These ideas all might ring true in other area of life, but they don’t have to apply to your singing voice. Singing does not necessarily have to render you “open” and vulnerable to the listener. Try to disconnect from these notions. The best way to do so is to see your voice is an instrument, and your singing is a product of your creativity and skill. Your singing is not a reflection of your “soul” (so to speak).
The same goes for creative lighting, like old lamps or customized Arduino-triggered LED lights. It looks cool, and it’s also handy in case one of the venues on your tour doesn’t have very interesting lighting options. Most venues will also let you hang a banner behind you while you play, which can really help people remember who you are without you reminding them after every song.