My DD was like that too from a very young age, refused to wear anything I offered her unless she wanted it and she put it on. As soon as she could dress herself she chose her clothes - we give her guidelines around the weather but she ultimately chooses Very determined! DS on the other hand is nearly 4 and most days we have to dress him, or DD does it for him and other than occasionally asking for a Thomas shirt or "tracksies" as he calls them, he doesn't care a whit about what we put him in!!!!