yeah, my standard travel kit is a leica CL with a 40mm, a 25mm, maybe the 15mm and the 90 mm ... very light, small and versatile, although the most versatile thing must be the photographer.

And the Olympus XA with its fixed 35mm lens usually ends up being tucked into a pocket because it is the favorite street shooter because it is so fast to use.

but the real answer is take what you are most comfortable using, what you normally use anyway.