The sound of kids running through the house was comforting, even the occasional fussing didn't bother me. While before I would play with a baby briefly, once the crying started it was my cue to move on. If the diaper was heavy forget it, I wasn't going near the monster. I'm still not going to be changing any other kid's diaper--I'll get a crash course with my own soon enough--but I guess knowing that I will be a dad soon kind of changes my perspective.
Another thing that's going to take some getting used to is the kid shows. I can deal with a good kid's movie but these shows are brutal! I'm told you get used to it, that you sort of become immune, but I'm hoping my kid likes The Office.