Eh... I just think they're overused... but I will hand it to them... they kind of /are/ that badass. Sure, every government has the groups of it's military that people latch onto because they are tough /and/ attractive (I.E. Green Berets) But the ones that actually get the MOST done tend to be the ones used the most (I.E. Marines)
FTR, I'm American.
Seriously, I prefer Imperial Fists or Iron Hands (Big fortresses and lots of tanks FTW)
Vanguard Veterans. This is what they do. I've got a squad of 8, and they have killed more than their points worth of enemies in almost every battle they have fought in. Record was 2 squads of fire warriors 9 in each, a squad of kroot(15) and a devilfish in one game.
The overheating on the plasma pistol isn't really "plasmy".
The daily nitpick would be: You could add fiery tails to the drop pods to make the whole feel more epic, currently all attention is drawn to the ultra (as it should) but adding action in the background suddenly adds a new layer to it; "Hey look whats going on in the back!"