Flat set
scent post
toy set
blind set 
dirt hole
Most of my sets are some variation of a flat set.  My scent post sets, I don't call scent posts, but a pee post or gland lure and urine.  The post is usually something natural, whether a small bush, old stump, rock, snow hump, or simply a pile of coyote, wolf, or dog crap with urine shot on it and possibly gland lure.  The only "toy" sets I make are using a bone, most often a t-bone as a attractor and backing.  Everything except a pee post I generally call a flat set, and pee posts and variations of flat sets make up at least 80% of my sets.  Blind sets I only make in the snow, where they can be very effective, have a good chance of picking up a wary old canine.  Dirt holes are something I just don't make that often.  I throw one in now and then as a changeup, and they catch stuff, I just figure almost everything I can catch in a dirthole I can catch in a flat set and they are more likely to be wary of a dirthole.  Also I'm often trapping in frozen ground where digging is a pain, or in rocks, or in snow.  So it is easier to make a flat set or pee post.
Caught a pair of adult coyotes today, and the male was about as big as I've come across here.  He was caught in a flat set/scent post with a pile of coyote crap (some old and already there, added to with a turd squeezed out of a coyote caught the day I made the set) with gland lure and urine.  The female was caught 50 yards away in a flat set with a cowpie backing and some Violater 7 under it.