I'm a master zerg player and I've never really tried dropping. I just don't find it to be efficient/effective, but maybe I'm just blind. If I were to start trying it(Which I really should), I'd start with banelings and infestors. Separately of course.
___________________________________
' - is for Boxer - is for Idra - is for I have no self respect'
the great ToRZorba hating on chargelot/archon Previous known as ToRBobby
Infestors can do TONS of damage to unsuspecting players. Roach/hydra drops can snipe tech very easily verse a turtling Protoss if you can't engage the front of him. If you are going for a ling/infestor/ultra then you can drop 2 ovies full of lings.
Well I´ve started dropping roaches at toss main when he moves out, Lings are not that effective, you can also drop Ling bane and burrow banelings at the ramp when he´s busy trying to save all his workers.
The most effective if he isnt inbase is ROACH drops, if not lings. But if i really want to get lings into his main i´d rather using a nydus worm
You should watch Morrow replays or stream. He is incredibly talented at dropping and running by almost constantly with lings and banes. Dropping a ton of lings can be super effective, especially when upgraded and when your opponent is just moving out of his base.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.