Ours rotate through but all time favs are:

Pamela Allen - particularly Mr Megee
Mem Fox
Charlie and Lolas - lots of those here
Anything Thomas
Dr Dog - that book is hilarious
Guess Who
Spot - in fact any lift the flap
Rainbow Fish

We have a huge selection though but they do tend to come back to favourites. DD is now at the age where we read novels - we read a chapter a night to her, things like the Rainbow Fairies, Dr Suess, Pinkaliicous etc.