I'm pretty content with letting others command. I had a pretty hilarious 36-3 game as the aliens. I built up a lot of points and then birthed an onos and stalked a corridor, stomping whole groups of marines as they came around the corner. And then my commander dropped a cloaking device nearby, so I would stand right in the middle of the hallway until a group of marines started bumping into me and then I'd spring out of thin air and ruin their day. I was pretty amused. I've seen some people use the phase-shifting alien assassin extremely well; like drop into the marine's base and fight 5-6 marines solo, coming in and out of the fade like Nightstalker invading the White House. Pretty entertaining to watch. I can't fly the "lerk" worth shit, though, and really can't even tell of what use it is. I find the marines to be a little more difficult of the two to play and have strong scores with. That said, there's way more camaraderie with the humans. There's just something really appealing about banding up with another bro and stalking dark hallways together.
Overall, I'm really impressed by this game. I think there should be more like it. I don't know why there are so many games where you just shoot humans who shoot back. Gaming is such an endlessly creative medium and too much of it is wasted on banal concepts.