For me, probably 35 f1.4


Kind of wide, good for playing with perspective, but still 'normal' enough for a wide array of situations. Great in low light, so I don't have to worry much about flash.


Macro work with any lens is really fun, but usually more tedious to really get what I want, and so requires a greater investment in setup time.


With the 35, I just fling my camera around, and see what I get.