Paid tournaments I tend to play more tight,
freerolls will depending on the opponents style, generally I play more loose.
I play aggressive, unless that there anyone who are callstation or that always raise my bets.
I advise you to choose your hands in according of your place in the table, prefer play in the last position, don't get involved in hands with many raises before you, unless if you have the top of your range.
Aggressivenes is also important, but there are some moments that the is more proflitable, like when you are in the last position with so many players in the hand, call in this situation with suited conectors and anothers good especulative cards can be lucrative, I per exemple like to play low pais against many players, when I hit a set on the flop, generally I win a lot of chips, but with caution against flush, straight or if appears two pairs in the board, difficily will be other set, but if you suspect someone has, be careful.