I am somewhat half and half, I want Elyse to be able to go to sleep on her own so at night she goes into her crib at her bedtime (10pm) then sleeps.. sometimes she wakes for a bottle between 6 and 8, if she does I get the bottle and bring her into my bed, because she goes back to sleep until 10 or 11 typically, but lately she has been just sleeping until 10:30/11, and doesn't come in my bed anymore.
I have co-slept for an entire night and I loved it, but I don't want to deal with bedtime issues later or wean her off cosleeping so I've refrained from doing it, personally, but I can understand why people do it.
I don't live with my OH/her father so it's not an issue there, but 2 coworkers of mine have a daughter together and up until 18 months (when I went on mat leave) she was not sleeping in her own crib, the guy complained all the time because he had to go sleep on the couch and if they wanted to have sex they had to do it on the couch. lol.