DS1 was in his own room about eight weeks - when he outgrew the moses basket. I tried him in bed with us, but he preferred his cot. He's v independent, will play for ages by himself, actively seeks out his own space, etc - I figure it's just his personality.
I did sleep on the single bed in his room and he fed at night till he was about 10mo when DH went to sleep in with him But sleep was all pretty much academic with DS1 until he was about 19mo because he had horrible temperatures every couple of weeks (teething-related) and was often up for a couple of hours in the night while he shivered and burned up at the same time
DS2 is either in a cot in our room or in bed with me and DH sleeps in the single in with DS1 (we only have two bedrooms). DS2 starts the night in the cot, but prefers to be beside me at night - he feeds, we both sleep - I think he didn't wake between 12.30 and 7.15 last night, but I couldn't swear to it.
I couldn't have co-slept with DS1 because he wasn't interested - he also didn't like being in a sling, but DS2 gets really excited when he sees the ring sling and on Friday slept for two hours in it as we travelled to Kent on the train. He's very different from his brother - I think you need to take your child's personality into account when deciding about where they sleep, but personally I couldn't have been away from either of them at night before six months - they're just too little.
And both of them made mad growling chuckling noises and DS2 in particular was rarely quiet either asleep or awake with chuntering noises - I learnt to sleep through the noises and only wake up if my norks were required. I found they get much quieter (fewer random mad sounds) once they're past about 3mo anyway.