Most people think of the 50mm as a standard lens, I think that for general use a 50mmm is slight too long, so I own far to many 35mm lens. The Summicron 35mm f/2, the classic Nikkor F mount 35mm f/2, and the Nikkor Z mount 35mm f/1.8 S.
The rumour sites are now talking about a new Leica Summaron-M 35mm f/2.8. Most Leica users like fast glass so this will be an interesting one, is it going for a more vintage classic rendering?