In the beginning of trying this, I used either protoss or zerg because all the pros did this, but never worked out really well for me. I tried terran and after figuring out a pretty good BO, I have been on a pretty good win streak. I'm not very good but I'm 19-13 and D+ (2530 pts :D) So I decided to share my secret with you all, if it is even one
Just for advisory, I am not sure how viable this is in terms of higher up gaming in 2v2 but it has worked for me pretty well, I've beaten a couple of C players. This is my general BO
9 supply
11 rax
12 rax
14 supply
16 gas
18-20 academy
If I can't win at this point, I then build a factory and pump tanks and go M&M and tanks.
This isn't really a secret at all, but if you're a terran player and want to try 2vs2, bio works really well.
Enjoy!