DS is 2.7 and only ever does 'director' imaginative play, not 'actor' imaginative play. So he makes trains and cars do things, and will use random objects eg glass pebbles as cars to drive under bridges. He gets toy people or soft toys and occasionally gets them to walk around or puts them in vehicles etc.
However, he never does imaginative play where he is the person pretending to do something eg drive a car, play shopkeeper etc. He has occasionally played at cooking / giving someone a 'cup of tea' (usually when copying another child) but he generally thinks playing with toy food is dull - he only wants to help with the preparation of real meals.
I presume that's normal?
I did read something which suggested that children do either one or the other. To be fair, I'm not sure I've ever played 'pretending' games with him.