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)