The roles in the game is almost the same. So choose what you like the most and enjoy it.
Still try to help each other most possible.
It's not just all about rush and shoot, but a lot about fire and movement...

Squad Leader
When being squad leader, make sure you report in often, so everybody know where you are ...
You have to be in control of the game, and it will be, if you can make decissions to
where to attack og defend

Team Leader
When being Team Leader ... you must lead your team. See where they report in,
where enemy is, and so on ...

Rifleman
The Rifleman will be the man in front, the first in trough the door.
It is important to help sniper, 203 og SAW when reloading.
Caus they are slow in reloading. Cover medic, when healing ...

Medic
Stay back, so you will be ready to cover hit team mates, when they need healing.
When you are medic, YOU ARE MEDIC ... then help when you can !!!

203
Your primary task is to provide supressive fire, either to support assault or to
supress enemies...
Watch out, not to blow up mates !

SAW
SAW is the main support weapon. lay a lot of fire, en areas where enemy can be, to
make it safe for attacking team mates
or use SAW to entertain enemy, as they advance on you position

Sniper
Stay high and lay low. Nothing but sneaky. You are the key and the main supresser.
Stay cool and snipe all you can