Most people don't know this, but Roe v. Wade as a landmark case for two reasons. The first, of course, was that it took the ability to regulate abortions away from the people's representatives, the legislatures. Second, it created a right to privacy in the Constitution. Already, the abortion regulations set up by the Supreme Court are becoming obsolete with new procedures being developed, such as partial-birth abortion, which is why the courts should not legislate.
I most oppose the right to privacy created by the court. I am not against a right to privacy, if someone wants to put one in there. But to find a right to privacy in the Constitution through the "penumbras and emanations" is really just making it up whole cloth, which I oppose.
As for gay marriage, again, it should be up to the states. There is no Constitutional right for gays to marry. First, because marriage is not a right (although procreation is). Second, for the purpose of marriage, gays are not equal: it is impossible for them to procreate, which is the purpose (but not a requirement) of marriage.
My purpose is not to re-litigate these issues, but to say that many feel these cases were badly decided so they should be overturned, not just because we oppose those issues on a religious basis.