I eat it all together; I don't have the patience to wait!
I usually pull apart the layers and scape everything off and eat all that then if I'm still hungry I'll eat the pasta part

I usually have mine with chips. What I'll do is dip the chips in the cheesy layer and then, when all that's gone, cut it up into chunks and just eat it like that.
I'm the same when it comes to savouring favourite parts of a meal. My brother loves meat so he'll always eat his meat first. I keep telling him to savour it but he won't. Then he ends up leaving the rest of his meal whereas I'll eat everything on my plate until I come to the best bit.