As far as argonian skin feels like, I remember a dev mentioned it is less like crocodile skin, and more like snake skin. However, with the advent of The Oblivion Crisis, the Hist did pump some mutagens into the argonians in order to make them more battle ready (as mentioned by Mere-Glim in the TES books). Since then, it's probably more rough and leathery.
Yeah, the Argonians were so nasty during the Oblivion Crisis that the Dremora were scared [censored]less of them when they started pouring into Oblivion Gates. The Dremora had to shut down the Oblivion Gates in Black Marsh just to save themselves from the Argonians. Wonder what would be the result if a Argonian and Daedroth mated?
Anyways, Argonians would likely make incredibly good martial artists, perhaps even better than Khajiits, due to their "appendages". Not only do they have sharp claws like a Khajiit, but they also have a thick, scaly tail that probably hits like a battering ram when swung like a round house. Imagine a Argonian choking someone to death with his tail. Some Argonians also have spikes or even "ram's horns" protruding from their head. Imagine getting gored or head butted by those. Plus like said earlier, they have natural armor in the form of their rough scaly skin.

