Having grown up an only child, many of the aspects of having two DCs are still completely baffling to me. I think it's one of those things where you can't really imagine the other side from the way you grew up (ie either having at least one sibling, or not having any).
Mine are DD 6 and DS 4. I absolutely love having two, and am full of happiness hearing them so happy to see each other when they wake up, or DD being desperate to read DS a story etc. This morning she gave him a picture that said "to [DS] this piccher is for you I love you so much I cod maby berst" and even though I've had two for 4 years now it still surprises me how much these little things means to me, because it is what I imagined and wished for when we agreed to try and have more than one child. I'm not saying non-onlies wouldn't feel so strongly BTW just that I find it very 'new' because I have no experience of a sibling bond IYSWIM?
And on the flip side any issues around sibling rivalry, sharing (or not) etc, I am
because I again have no experience of it. So when they fight I still have very little clue what to do

Anyone else? :)