There is no 'best' way to play except the way you feel most comfortable with.
Some players are aggressive all the time and play any two cards (ATC) and bet aggressively to put of their opponents, others play tight and select which cards they play and only play in position (on the button, blinds etc).
The best bit of advice i can suggest is play your game the way you want to, dont change your game to suit or match others. Mix it up by all means - but when you want too.
As for play in Freerolls
well - not everyone in the asylum is a patient but sometimes you wonder lol