Funny, I never thought of Kyle Katarn being particularly blown up. This may be because I've only really ever played DFII from start to finish, which I thoroughly enjoyed. I think this quote from LiverandBacon effectively explains what badassness there is to be found in Kyle Katarn:
"For instance, the power of the beard explains why Kyle Katarn can hold 8 guns, all their ammo, various kinds of explosives, various ID cards and miscellanea, and a lightsaber, without any of it appearing on his person, or affecting his his speed or stamina. His powerful ability in the Force, when combined with the manly majesty of his beard (voted #1 beard of the New Republic over 13 years in a row), gives him limited access to a pocket of hyperspace. This allows him to store a theoretically infinite number of objects without consequences, by seemingly hiding them in his beard. I theorize that Revan must have also had a majestic beard, and the Exile, well, who knows what was up with that lady."
That aside, alot of the jokes turned out to be Chuck Norris jokes but replaced with Kyle Katarn. The better ones tend to have context in the Star Wars Universe.... and of course the more nerdy and specific they are, the funnier they are.
Fact: Kyle Katarn has the death sentence in 12 star systems.
Fact: Kyle Katarn is the death sentence in 20 star systems.