Team Game Strategy

I am a silver league team player (as well as in 1v1) still playing WOL. I really enjoy playing team games with random people on the ladder and my team seems to win about half of the time. My question to those who play team games is what is your strategy? Do you like to go for a timing push or sit back and macro until 200/200? Does your strategy change at all if you're playing with someone you know? WoL or HoTS answers are fine, doesn't make much of a difference.

For example, I enjoy doing a lot of scouting and sitting back until 150-200 supply before pushing out with my army. However, when I'm playing with people I know, we usually try to go for a timing push off of 1-2 bases.