kirite - opposite for me I think. Before I had kids I found kids cute and adorable and funny and thought it would be one long fun fest with a few hard bits thrown in.
Now I have realised although I can like children perfectly well as people, I struggle with the childish parts - I don't like them being sticky, I despise toilet humour, I don't like them being loud and shrieky and excitable and boisterous and in your face.
However - the overintimacy just isn't an issue when they are yours, really it isn't. I'm not the kind of person who got teary when they said I love you for the first time or finds my anger evaporating from a kiss/cuddle etc, but it's just nothing like an unrelated child being intimate.
You do sort of get used to the noise and when they are yours you can tell them to bloody well shut up (maybe a bit more nicely!) rather than having to wince and bear it. If you have one child then you can skip a lot of the mindless noise because that only really seems to happen with groups of children all together, but on the other hand if you have 2+ you won't have to do as much "playing" because they tend to go to each other for that.
What I do like is seeing them develop and grow as a person, some of the funny/cute observations through a child's eyes, and the older DS gets the better company he is and the more fun to spend time with too. It seems like most of the bits I'm not keen on tend to be mostly restricted to young children, too, so that helps especially if you're thinking long term.