Combat Demolitions. I love Medium Assault (the Pulsar, in my case) and LOTS of combat engineering. Bombs are my favorite. If the Talent Trees allow me to JUST focus on different kinds of explosives (anti-armor, anti-personnel, proximity, remote-detonated, etc) I will just become a MASTER of the Pulsar and of tactical explosives (none of that damn "hand grenade" nonsense). I wouldn't turn my nose up at sentry guns or other combat engineering toys, such as sensors and stealth-field generators, but if I could JUST play as an advanced combat demolitions commando, I will