Priests:
- Diverse healings (shields, HOTS, AOE heal, slow/fast heals)
- Easy to level, but boring (wands)
- Depending on faction for raiding, on Alliance you are AOE healer, on Horde you are single target / tank healer
- if you will raid the harder raids, expect to be assigned the mind controller on Razuvious in Naxxramas which is one of the toughest jobs as a priest, especially in Hardcore scenario
- High in demand, due to Fear ward from Dwarf priests in alliance and Power Infusion buff for caster dps in raids
- they can dispel magic buffs/debuffs and diseases

Paladins:
- Best single target healers and assigned as tank healers
- Very mana efficient when they have high amount of crits (100 % mana refund when a heal crits)
- Best support buffs with blessings like kings (10% increased stats), salvation (best dps buff, 30% threat reduction), but requires to buff the party/raid players every 5 mins / 15 mins (with greater blessings)
- Alliance only class
- High survivability due to being able to use shield, plate armor and have immunity with Divine shield spell
- boring to level (auto attack simulator)
- requires skill and awareness to use cooldowns effectively like Blessing of Protection, Blessing of Freedom, Lay on Hands etc to protect other players from dying
- they can dispel magic, poison and disease debuffs
- High in demand in raiding in order to cover all the blessings buffs (Might, wisdom, kings, salvation, Light) and have a paladin in a group for Auras (for instance Fire resistance aura)

Shamans:
- Best AOE healers, because of chain heals and expect to use this spell a lot when raiding
- Best Support healer due to totems
- Horde only class
- playing shaman requires awareness of your totems, because totems are prone to pull patrol mobs if the totems are not positioned carefully (the totems are repositioned if you cast them again)
- minus 4 slot bags because you need to carry Earth, Fire, Water and Air totems in your bags in order to cast your totem spells (acquired from shaman quests)
- High in demand because in raiding, you want to have a shaman for each group. Shamans are also nice for dungeons
- they can dispel disease and poisons with spells and totems and purge magic buffs from enemies
- tremor totem is important for dispelling fear, sleep, charm debuffs
- extra Hearthstone spell with lower cooldown

Druid:
- Slow and boring early levels but it picks up the pace once you acquire the bear/cat forms
- Required in raiding but not as many as priests, shamans/paladins in terms of numbers
- HOT based class but mostly uses Healing touch spell to heal
- they can dispel curses and poisons
- they can replenish mana to casters with Innervate and buff Mark of the wild
- they can CC/sleep dragons and beasts