It really depends on personal preferences and the type of the app. Also depends on when you are using the tool and the content it has (photo, text, audio...)

For exemple, I wouldn't see Spotify with a Light UI and I would definitely like the design tool I currently use to have a dark interface. Recently I've started to add a locked dark blue grey rectangle behind the artboards.

For me, in this particular case, I would go with the Dark but definitely would alternate between the 2 options depending if I work at the office or at home (long nights in my home office).

Best,