Not my favourites, but two of my best...
Burna Boyz, full 15, on the charge, using burnaz as power weapons. Such an Orky sight, such a crazy freakin' unit.
Nobz, 10, cybork, painboy, 3 power klaws, 3 big choppas, WAAAGH! Banner. 20 S5 I4 attacks, 12 S7 I4 attacks, 12 S9 I1 attacks on the charge, WS5, all good. All good.