To me, powersuits on characters don't really detract from "badassery"... not only because of fighting in vacuum or toxic environments mean death without some form of environment-sealed suit, but also because in most cases, the enemies that character faces still manage to outstrip him in strength, speed, et cetera...
Warhammer 40k is the perfect example of this. The imperial guard could be considered most "badass", because they're just grunts fighting the horrors of an insane universe with (often) 20th-century-level armour and a laser pointer. Ten again, they die in the millions more than half the time. You could say, on the other extreme, that the grey knights/deathwatch are the most "badass", they do what the Guard do, only, without dying and with far less of them to start with, but they get fancy powersuits and machine-gun-rpg-launcher-hybrids. And that's the basic Marine.
I take 40k because it has examples of both powersuit and standard-guy "badassery" but the point is made. That greyknight in his fancy terminator armour can still overcome a daemon capable of turning him into sludge by looking at him, armour or no armour. That is still badass. But it doesn't detract from the guardsman who stood his ground against the same daemon, died instantly but bougth the GK enough time to land his killing blow... both badass.
Tl:dr powersuits don't count, it's what you're up against and your willingness to fight it that does... in my opinion anyway...