the Sony Zeiss 55mm f/1.8, (that one with the concave front element), is my one desert-island lens, for sure. Me developing my own style went hand-in-hand with getting to know it better for a few years.
I used to love using “weird” and specialist lenses, but it’s so versatile, it killed my trying all kinds of cheap/vintage glass- since getting the Zeiss, everything else just stays in the bag.