i prefer early zergling and roach mix. i also plant some spine crawlers if the enemy's a zerg in the beginning. bad thing is that you have to mass-plant it altogether or it will fall apart pretty easily and you need to have good teamwork. however, if you do, you can wipe that player's multi possibility and keep the pressure on for the entire duration unless you don't destroy them b4 they make up enough roaches+zergling/baneling method. if you are playing a match where the teammate's base is close to one another, you can make a nydus worm at the spine crawler nest and supply units quickly from there. it does work, and shouldn't be easy for the enemy to destroy the base as it SHOULD be crawling with bunch of spine crawlers and ur reinforcement.

Muta surely is one of the best ways to kill off annoying roaches who can easily melt your cute banelings... Well, that build is totally not suggested when it comes to vT though. Mass marines can have a muta-bbq if they bump into a muta group. Be careful about that. Roaches ftw when it comes to terran! Careful for roadblock+tank combo though...