You have indeed conflated pro-business Republicanism with rank-and-file conservatism, as I suspected.
A quick glance at a graph of federal spending as a percent of GDP for the last 100 years shows an upward trend no one can miss. Conservatives (but not necessarily Republicans) would like to see that return to pre-FDR levels, but hold little hope of it happening. And I think they would see government stay entirely out of the same-sex marriage debate--taking neither side, but leaving that up to the States or the people. (Seems like I've read that phrase someplace...)
(But I'm glad to hear you opposed Obamacare.)