You should never rest for more than two minutes between sets. In 90-120 seconds, you have just enough time to catch your breath and hit that next set with maximum intensity. Rest beyond two minutes, and you run the risk of losing your pump. Once you lose the pump, forget about it. Your training is shot.

When i'm training for strength, 5x5 type workouts i like to keep my resting time between 2-3 minutes. According to this, i'm doing it wrong. What do you say /fit/ , 1-2 minutes or 2-3 minutes.

source: http://www.bodybuilding.com/fun/animalpak11.htm