Just finished it on Brutal, amazing game very worth the waitcannot wait for the protoss campaign.
Usually i'd say "Well that's a short f*cking campaign" since the game just went out, but knowing your speed it seems like it's worth every penny
Just try to focus on playing solid and you'll do okay.
Sure thing. 1 gate expand is quite popular at the moment too. Forge expands give you a better economy but later tech so you can't really put on pressure early. 1 gate expand gives you more early options aggression-wise which prevents zerg from going fast 3 hatch and up to 60 drones before you can do anything (which happens vs forge expand). Both are common though. 1 base stargate does sound a bit dated unless its like a proxy oracle build; but that's gimmicky as hell.
If protoss manages to get the army composition he wants then he should usually have the stronger, more cost effective army in a straight up fight but as zerg you have the advantage of being able to expand all over the map and also being able to remake your armies super quickly. The exact thing you need to do depends on what unit composition he has obviously so it's hard to say what you need to make without knowing more. Also make sure you are remembering to get upgrades from the evolution chamber; it makes a huge difference to how cost effective your units are if you end up behind or ahead in upgrades.
Protoss armies work well in when their units are in combination with each other but if you break down one part of the composition then you can usually overwhelm the rest of it. For example immortal/sentry based armies trash low tech zerg armies, but as soon as he runs out of forcefields you can just roll over him easily even though his army 'counters' yours. If he has loads of colossus and you have a big economy you can make a shitload of corruptors, fly in and suicide them all to kill the colossus then immediately remax on like hydras or something. It won't technically be cost effective but it takes him so long to rebuild all those colossus whereas in contrast you can make all your units at once (assuming you have enough larvae).
After a while you do need to switch into higher tech units as well. Compositions based on lings or roach hydra just stop doing anything at all vs the protoss army after a certain point. Broodlords, swarmhosts and vipers all allow you to throw out free units which means you can fight a lot more cost effectively vs protoss armies. The classic zerg lategame army is broodlord/infestor. You make a bunch of broodlords (usually only like 6 at first but as you throw away your lower tech units you want to build up your count as high as possible) and they outrange everything protoss has on the ground; you use the infestors to fungal growth anything that tries to come in range so they get stuck. When you attack you throw down a load of infested terrans and the protoss player ends up trading lots of his army or base just to kill broodlings and infested terrans which cost you nothing at all. This is a strategy from WoL which is a bit outdated now since voidrays are stronger, infested terrans are weaker and protoss has the tempest now which outranges anything you have. It's still sort of viable though if you make a bunch of corruptors to try to deal with tempests and try to fungal the voidrays whenever they stack up.
Vipers are also a really great support unit for making pretty much any army you make more effective. For example if you're playing roach hydra in the mid game and he gets like 3+ colossus out in addition to gateway units then you pretty much won't do anything with your army. You can use the vipers abduct spell to just yoink all the colossus into range and focus them down and suddenly your army is way stronger than his (if you don't have hive yet then you have to go corruptors instead in this situation to deal with colossus).
Another composition I've been liking is mass swarm host with either hydras or queens supporting at first and corruptors later. It works similar to the broodlord infestor in that the swarmhosts outrange everything and your enemy ends up fighting free units all the time so anything you kill at all is cost effective. You can also go in with your hydra army behind a wave of locusts that the swarm hosts spat out and use them as a meatshield, when the locusts die you retreat with the hydras and come back again when more spawn.
It's still pretty early days in HotS so it's all quite up in the air with regards to what the best way to play is. in ZvP I've been having success with either: roach/hydra and then adding corruptor or viper; or hydra/swarm host and then going corruptor.
Grats
Cheers for the insight, I'm good at early/mid game but late game is my problem as i get confused as to what units to bring out mainly because of the fact i haven't had many games that run into late game units they are usually over by the 15min mark.
Tried Swarmhosts a few times and the units they throw out just seem to get battered before they can actually do anything but i have only had 3 of these units out how many do i need to make them effective?
There's a lot i need to learn ive only been playing MP just under 2 weeks so i'm new still
Also ZvZ those little bastards who do a 6 pool destroy me is it best to do a 6 pool everytime vs a Z? because by the time i've scouted his base at 12 supply he's already built up his pool and making lings.
Basically I get to a fairly good economy (usually 3 base but sometimes 2 base and drone up my 3rd once I've already started producing them (there are also some 2 base all in swarm host builds but I don't use those much)) and then put all my resources into swarmhosts and upgrades for swarmhosts (ranged and armour at evo and the locust upgrade at infestation pit). The exception to this is if he goes stargate I need to invest in some anti air so I just get enough hydras in order to scare off his air units and go right back to swarm hosts (queens can also work if you have good creep spread). Then you get out on the map in front of his base with your swarmhosts and burrow them and rally to his base. Once you've fired a round of locusts, unburrow again and walk back. This means that even if he kills them easily he can't just walk out and kill all your dudes. Every time you have another round of locusts ready you just burrow, fire, unburrow and walk back. If he does move out then fire another round of locusts while continuing to run away. I just keep doing this to keep him in his base, slowly wear him down while building up a stronger army at the same time. His best options for dealing with it are colossus and voidrays. If he's making lots of voidrays then I make a load of hydras and if he's making mostly colossus I make corruptors. I try to keep an eye on what he's doing so I have the right unit composition should he move out and try to fight my swarm host army.
Now I've got to grips with things I've managed to get to the top of my platinum league. Unfortunately I have so much work to do now I probably won't log in again for a couple of months 
