The State has an article with the full list, I'm only going to comment on selected races.
http://www.thestate.com/2014/03/31/3359047/sc-elections-the-dance-cards-are.htmlFirst off, Haley has an unexpected primary opponent for governor in ex-State Rep. and ex-Judge Tom Ervin. Looks like Ervin's purpose isn't so much as to run against Haley as it is to use the race as a soapbox to speak out against problems at one state agency. I don't expect it'll be even as much as a hiccup for Nikki's rematch with Vince in the fall.
Lt. Gov is the marquee race with ex-Attorney General Henry McMaster facing off against Mike Campbell (Carroll Campbell's son) and two others in the Republican primary. Since that race will essentially determine who our Lt. Governor will be, and it's far from clear who will win, I'll likely be voting in the Republican primary. I can't say I really care for either McMaster or Campbell, but neither do I despise either of them. For different reasons, I doubt the ability of either of them to use the office as a springboard to the Governor's office in 2018 unless Haley becomes Vice President or a Cabinet secretary after the 2016 election.
In the Commissioner of Agriculture race, incumbent Hugh Weathers faces the aptly named Joe Farmer in the primary.
Superintendent of Education is a crowded race with four Democrats and eight Republicans running. I fully expect that both races will end up in a runoff.