[jmc]

A quick rundown of the advantages/disadvantages of a tight/aggressive style:

Advantages:
1. You'll tend to get involved in pots with the best hand preflop.
2. Your bluffs will tend to get more respect.
3. Opponents may have a difficult time detecting when your opening requirements have dropped when the blinds start going up.
4. Your post-flop decisions will become easier because your hand should be well defined.

Disadvantages:
1. Your hands are easier for your opponents to read, but the opposite may not be true.
2. You may be passing on some very profitable situations against the bad players in the early stages of a tournament.