I have a crib and a pack and play. DD1 never slept in either one as a baby, although she did use the crib as a sidecar and then a toddler bed later on. The crib was basically a giant cat bed for about 15 months, and the pack and play lived at my mother's house (where amazingly enough DD would actually sleep in it; cosleeping at my mom's house means sleeping on the floor, and DD would never go for it.)
Now DD2 actually sleeps in the crib for the first part of the night, because I have to nurse DS down repeatedly to get him to sleep at night, and we wake poor DD2 up. She joins us later on in the night once DS is settled.
And the pack and play makes a nice place to dump all of the random baby and kid toys at the end of the day so that DH and I can actually live in a neat house for an hour or two a day.
I have these grand ambitions of someday teaching DS to sleep part of the night in the pack and play, to give my poor boobs a rest, but in my heart I know I'm delusional. DS is a smart, smart boy, and he ain't goin' for it no way no how...