OK, I think I’m being an old-fashioned fuddy-duddy, and I hope my readers will comment if they think I’m way off base:
I really dislike seeing cabaret performers wear a watch on stage.
I think this comes from an old-fashioned notion that watches are inappropriate with formalwear because it should be assumed that people in formal wear have all the time in the world to pursue the leisure activities for which they are dressed. And translating into a performance, no matter how tight the slot the management gave, I think it should appear that the performer has all the time in the world for their audience. (And if someone needs to wear a watch and keep time, delegate that to the music director.)
On the other hand, maybe the problem is that I notice watches on performers who aren’t compelling enough to keep me focused on their face and it gives me something to think about because I’m not enraptured by a performance.