Just to add to the mix, I have DD (nearly 6) and DTs (boys, nearly 2). DD has lots of different toys - cuddlies, cars, pram, kitchen made out of a cardboard box, dolls' house, dressing up stuff, etc. Boys have garage, cars, and are allowed to play with everything their sister has. DT1 is an outgoing adrenaline junky and DT2 is shy and retiring limpet. DD is confident, bright and all things lovely!
DD does quite a lot of dressing up and likes her hair done, but frequently leaves the house without it seeing a brush. Has no problem getting wet and muddy, but also likes to look pretty and asks which colours go together when dressing occasionally!
DTs love wheels with a passion! They'll tip the pram over and whizz them round for ages. But they'll also put DD's dolls and cuddlies in the pram and wheel it round, give the dolls cuddles (caught DT2 checking a nappy today), play with the dolls' house more than DD does and love having their hair brushed (which also doesn't happen often). They also like puddles and mud.
I think all my DCs have a certain traits that are gender specific, but they also cross gender lines too. DT1 likes pink and chose a pink drinking cup a month ago, and likes wearing DD's ballet shoes. DD has only just learnt from school that pink is a "girl" colour. DT2 was spotted in DD's sparkly silver shoes the other day, and is as cuddly and caring as they come.
I do try very hard to treat them to their personality rather than gender. My plan is that I'll end up with two boys who will be worthy of their partners (whatever their gender preferences!) and a girl who's capable of making her own decisions without apology.