Don't listen to the drunk dragon... grandfather Nurgle embraces all.
About the avatar... you don't know the half of it.. it's more like the other way around... "the canine take over has begun... one puppy-face at a time."
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I've used zerkers, they are decent at frontal assault and counter charge.
They've killed lots of good stuff... but it usually ends up being the powerfist doing the real damage...
Like killing land raiders, instant killing chaplains, cannoness, chaos lords....
I find that the 'normal' zerkers just are lack lustre in doing real dmg.. and are not 'FAST'... you see, zerkers were good in the past because they didn't rely on a rhino to 'get there'... their blood rage was inherent speed, therefore good at getting the charge in with the aspiring champions from hell / upgrades up the wa-zoo.
Otherwise, they are decent choices for a troops choice, good at anti-horde and the powerfist for everything else...
Yes, I'm baised towards plaguemarines, but I receive charges from genestealers and zerkers willingly... it's kind of funny how awesome it can be. It's frustrating to lose those charge attacks... and the T5 annoys most people... as the FNP... so you are relying on the powerfist to do dmg.... but you can get powerfists elsewhere for 'cheaper' than zerkers.
Anyway, do what is cool for your army... a central block of 2 squads of 8-12 zerkers footslogging or mech is a strong start.
My 7 Cents.