Most strikingly, Open VLD are explicitly in favour of the right of same-sex couples to adopt; and this is a campaign promise which can actually be implemented, as we are electing the Flemish parliament which decides these issues in Flanders. Dear reader, would it be possible for a potential party of government (Open VLD held the prime minister's position from 1999 to 2008) to run on adoption rights for same-sex couples in your country?
(Of course, here in Belgium we've had same-sex marriage for years - none of this "civil partnerships" compromising - and the world has failed to end; once you've got that far, it's obviously an anomaly if some married couples can adopt and others can't.)