I watched Sanctuary, through it's end, and enjoyed it, and was sorry it didn't get one more Season.
I tried Being Human, The "Heroes" show, Defiance, and Eureka, and none of them appealed to me, though, I watch Eureka all the way through, after it ended, and it was pretty awesome. Warehouse 13, also didn't appeal to me out of the gate, but, I started watching it when S4 was almost over, and I loved it too.
SGU is the only Space Opera that I didn't take to most of it from SyFy (Though, I did enjoy S2), so, I am looking forward to trying it out. (SG1 was 7 Seasons in, before I climbed on board with it, but, ended up enjoying it all once I climbed on board)