Had my first 1v1 placement tonight. Played mostly 2v2 with my friends, and few 3v3 and even a sprinkle of 4v4 mayhem. 4 win streak and 1 loss at beginning (maybe I'll get lucky and win my next one?) placed me on Gold. Went against 3 Protoss and 2 Terran players.
I went 9 rax, 10 SD build, just so I have fighting chance against any cheese, save for super fast proxy cannon. Then adjusted according to what I scouted and guessed their build. Watching those Day 9 videos helped a lot of gathering and deciphering intel.
1st game against Protoss - Lost due to my dumb decision not too attack him while he warped in 3 gates + his original 1. For about a minute I had 9 marines vs 1 zealot and 1 stalker. Could've done some economic damage. Second dumb mistake was building a expo and getting caught in middle of moving it out and mineral short on marines. Also forgot to bring back in 4-5 marines I had sent out to scout. Could've made a difference.
2nd game against Protoss - Scouted each other, and saw that he had 2 gas built, figured he'd go collosus or void. Built up a decent MMM ball with 3 tanks for support. Moved it in close to his base and about to hit it, when I saw his voids moving to mine. Tried rallying a quick viking + marine defense, but 5 Voids were just too OP. He was smart enough to snipe my production instead of going for my mineral lines with turrets. Since I lost the defense on base, I decided to just trade base with him. So I razed his base faster than his 5 voids, making sure to trap his probes so he can't sneak a building. He pulled out his 5 voids to stop my army from killing all of his building, but too late.
3rd game against Terran - Went slightly faster expo than the other guy. I guess he went mid-game Banshee+Cloak, but my nice turret+bunker combo took 2 of his 3 banshee out. Sent my MMM ball and dropped it inside his base, slaughtered half his marine, and he just dropped. Watched the replay, and saw that he had at least 20+ marines in his expo that might've stopped my attack.
4th game against Protoss - Went longer than should have. Few skirmish in middle with Stalker+Zealots+Collosus vs MMM+Tanks+Vikings. I pushed him hard, and he neglected to expand. I had 3 bases running by the time he filled his 2nd. Near the end where I was starting to raze his main, he had DTs, and I was totally unprepared. Had to pull my stuff back losing half my army to DTs, and most of my main. Managed to saved 2 starports and a barrack. Built ravens and refilled my MMMball. Just to slow his rebuild on his main, I dropped on to his 3rd, sniped his nexus before his DTs did too much damage. Once I got Ravens, dropped in his main, and razed most of it. Using my 2nd mass MM ball, I finished his desperate 4th base, and he dropped.
5th game against Terran - Hillarious end. Scouted and saw 2 gas again. Figured he'd drop or banshee. So I went 3 rax build + mass marines. Since the map was scrap station, I decided to blast through the 2 rocks. By the time I was at his gates, I had 20 marines with 6 in route, another 6 queded. Comsat the front, saw it barely defended, busted right in. He had a lone marines on the watch tower, but I bet he never guessed I'd blow through the rocks so fast.