Most of the time (~85%) I use a 0,6mm nozzle, very seldom a 0,4mm one (~5%) and a bit more I use 0,8 (10%) to 1,2 mm nozzles.
The larger ones I use in vase mode to insure watertightness.
I don't print a lot in PLA. PETG and ABS are my favorites. If I want stronger or more heatresistant prints, I use PC or the mix ABS/PC