So many of my friends are christian (indeed vicars!) and they all "cherry pick", believing the message about loving one another (and who could argue with that?) and rejecting those bits that they do not agree with (including most of the old testament). To be honest they are mostly (even the vicars) skating pretty close to being humanist in their beliefs.
Central to the christian faith are doctrines that make me squirm: original sin, being "saved", sacrifice, barbarity (crucifixion); and on top of that (though not central to most) is all the raft of imposed ideas about the inferiority of women, the "sin" of homosexuality etc.
If it is possible to lead one's life loving one's neighbour, spreading all the happiness one can without these pernicious beliefs, why not simply do so?