Originally Posted by
Npk
I'd have to say that the Empire is the best starting faction, standard humans with a versatile roster that covers pretty much everything except for monstrous units. Plenty of expansion directions through diplomacy and war.
For a veteran TW player you should pretty quickly get into the campaign side of any faction really, there's nothing really mind blowing going on. For example Vampire Counts has no ranged units (They do have magic though) whilst Dwarfs have no cavalry and a very limited form of magic etc.