Pros never seem to build bunkers anymore. "You should always be able to defend with mobile defenses." But at the same time, I see most many games lost due to a massive counterattack that goes around the terran troops and easily overtakes the nonexistent land defenses. Versus sunkens and cannons which are spammed.
How do you kill of a proxy 7 rax if you were going 11 ___? Send your drones/scvs/probes in? Is that good play? Clearly you want to get pool/rax/gateway ASAP, but how do you delay?
Why go 8 depot when it's possible to go 7 w/o cutting SCVs ever? Why wait? Why wait for 11 rax when it's possible, even at my D- level (I'd guess. Never wanted to get slaughtered online), to get 10 rax w/o cutting? There are NO downsides to this, except having to wait before producing marines. Possibly. But isn't it infinitely better to be ABLE to cut SCVs and get marines those few seconds earlier for the rush defense than not?
Also, when you expand, what # / % of workers do you send over? Why would you ever take a mineral only when there are gas expos available?