>>4272642>>4272665For me its the XF23mm f2. It's so absurdly versatile and just big enough to have something to hold onto.
I also have the pancake, exclusively shot it for 2 years, but it's not like a interchangeable lens camera will ever be pocketable like a fixed lens is.
XF23mm fits in the smallest bags easily and gives you a much wider view than the 27m, which I think is more akin to 35mm. I love it so much I even bought that stupidly expensive square hood for it.