I think it depends who your with, one SP I know loved giving bj to drain you and make sure she got every last drop over her tits, impressive site.
A couple have liked cim, one as your deep in her throat and another liked the open mouth shoot it in here! Lol
I enjoy it all, whether cim/cob/cot or in the bag finish, if it all leads to a finish and been enjoyable getting there then it's all good in my book.