Played the demo some more today, and came up with a good game. Basically me and two friends were assault class and kept giving each other ammo and then shooting tracer darts on each other. The darts were for fun, we were playing "dodge the missile" and I really wish I had a capture card, because my mate actually jumped over a missile and it blew up the vehicle behind him. Then we decided to run in covered in tracer darts and try to knife people, we looked like a group of lethal christmas trees. Then we decided to do the suicide bomber thing and covered quads in C4 and rode them to the objectives. We actually won the first section using that tactic, it really works. But my favourite tactic was covering the UAV in C4, and then jumping on a quad and waiting for the UAV pilot to hover near enemies and riding in to detonate the C4. We took down a group of snipers and a tank by doing that, the best bit is the UAV takes no damage from it because friendly fire is off.
When it all got serious I settled in to do some sniping, after taking it personally when a sniper killed me 5 times while we were having fun with tracer darts. I managed to go from 25 deaths due to suicides and general larking about, to top of the scores with 28 sniper kills. It always gets to the point where you have whole squads trying to track you down, or they send in choppers and tanks to kill you.