Orcs and Goblins - One of the most fun armies to play, with lots of funny and interesting units. A really balanced armybook, that has no real bad choices, lots of variety, and fun themes. They are just very unpredictable and not especially powerful overall compared to the top tier armies.
Vampire Counts - This army suffers from a lack of shooting and can crumble if the vampire lord dies Cheap Cigarettes Outlet. Core units are a bit weak. They can still be a tough army to beat with skeletons units that come back to life and nasty flying monsters.
Tomb Kings - This army's benefits include powerful magic, some nice unit combos, cheap skeletons. Some powerful choices for experienced players. No auto-win button but no serious flaws. They have some effective tools for dealing with various challenges and are solid, if not spectacular, all round.
Wood Elves - Their updated armybook later in the 8th edition cycle made some interesting changes. Treekin and Dryads were weakened, magic items were reduced, old tactics were invalidated. Currently not such a bad army, however, due to access to all lores of magic and some very high-damage-output units such Wild Riders and Waywatchers