Ds has been in with us since birth. He is almost 2. I was initially shocked by the intense emotions/instincts I had after he was born...we had a bassinet attached to the bed (arms reach cosleeper) but even that felt too far away for me so we have bedshared since day 1.
You won't really know what you'll prefer until bub arrives. I would recommend following the guidelines (roomshare until at least 6 months). I would try to be as supportive of your wife as possible, especially breastfeeding which can be very difficult early on. Roomsharing is also much easier for night feeds etc.