I was thinking about the Alien .. types, and each of their uses, and I thought of something rather odd.
The best hit and run type is, oddly enough, the Onos. I find it really strange watching the giant rhino alien come into a marine base, destroy one or two turrets, retreat, repeat, sans fun. I of course dilligently heal him whilst he does this, but it occured to me that neither the Fade nor Skulk have the amazing power the onos has.
Consider: Marines see Onos in a hallway. What do they do? Run! Why? Unless heavily armed (not armoured) they stand little to no chance.
Marine base is attacked by a solitary Onos. Team panicks, Onos is shot 1500 times, redeems or runs.
Once you get 3-4 Onos, the game is pretty much over. In even multiple numbers, the Onos can either do a long, drawn out siege, or even more effectively, hit and run base destroyers.
I'm curious what other people think of this: Is the entirety of the Kharaa race based on such tactics? Or is it just a strange happenstance that the Onos is the best at hit and run?