Races of the Horde: detailed analysis

The Horde is traditionally considered a “PvP faction”: its racial abilities are tailored to pressure.
Undead
"The Will of the Forsaken" - relieves fear, sleep and charm. One of the strongest abilities in the game: against priests and warlocks it's half the battle. The best choice for a PvP fighter.
Orc
"Bloody Fury" — bonus to damage and resistance to stuns, plus “Hardness” (reducing the duration of stuns). Ideal for warriors, rogues and hunters.
Tauren
"Thunderstride" - the only mass stun of the race: it knocks down castes and control of an entire group. Plus a bonus to health and natural resistance. Great tank and healer.
Troll
"Berserk" — attack and cast acceleration, the best burst cooldown among races. In combination with class cooldowns, it provides explosive damage.
Blood Elf
Mana Flow — area silence and mana return. A very strong tool against casters and in mass PvP.
Allied Races
Nightborne — teleport and “magic” bonus,Highmountain Taurens - damage reduction and range,Mag'har — powerful bonus to damage,Zandalari — active healing and protection,Vulpera - mobility and recovery.
Who to choose
For PvP: undead (fear removal) or orc (stun resistance). For Burst: Troll. For the tank: tauren. For caster: blood elf.