There are several barb builds that have high dps, are highly efficient or are simply apealing and its fun to play them.
I will try to describe 3 great builds, which i have experience with d3 gold. They are all DW builds, i did not play 2h for more than a couple of hours yet, so i'm not going to try and speak of my ass about them untill i test them. However i can point you to some already existing guides if 2h is your thing.
WW is undoubtedly the most widely used build for some time now, which is understandable. It's still cheap to make it work cheap diablo 3 gold, it's not difficult to play and it's extremely efficient.
The build + vatiations
Instead of OP-Killing Spree, different abilities can be used:
OP - Crushing advance - very strong dmg reduction and a minor heal from LS
War cry – Impunity or Hardened Wrath if you lack in the defense departement.
Rend – To kill mobs with high hp (AoE)
HotA-smash – For highest single target dmg Diablo III items for sale. I used this variation for uber bosses for a while and it's working great.
Passives – first 2 are mandatory, last one can vary
Boon for easier WotB uptime
Animosity/Unforgiving for fury problems
Bloodthrist for lack of healing
Supperstition/NoS/TaN for lack of defense
Brawler for dps