Babies, yes. Babies are easy. Unless the parents are pedantic and all, "my baby must never catch a glimpse of TV... ever!" or "we're speaking Cantonese to our baby, so I've written a list of words for you to use when speaking to him," or something equally as PITA and annoying.
People who are just like, "bottles are then, bedtime is then... call me if you need me," are awesome. I love babies. Even crying ones.
I can handle babies... but children talk. And make a mess. And nag. And whinge. And fight with other children. And wet the bed. And are irrational. Mostly, children p*ss me off... even mine does, but I'm used to her. lol.
I could handle having DD's cousins staying with us... but I feel comfortable enough to yell at them if I had to (they're teenagers now).