Dark Nest Trilogy
I think we can all agree that if "Nanna" (Ben's bodyguard droid) had been written to be more like HK-47, then the story would have been a LOT cooler (and have provided some nice humor to contrast with the grittier moment).
Looking cool isn't enough, battle droids need personality, like HK. The YVH droids are buckets of bolts in comparison.
Story is OW good IMHO, though I like LOTF a little bit better, because it has the KOTOR feel to it.