Funnily enough (well...its not funny....its damned right annoying) my hybrids are the 2 clubs in my bag that I am least consistent with.
Despite having a set of woods comprising 1,3,4,5 and 7 woods from the same range as the hybrids, with essentially the same shafts....all of which I can/could smote mightily with great consistency, the two hybrids I just cannot put a decent swing on them.
I suspect it is a weight issue/balance issue so will be having a play over the winter period to see if I can improve matters.