Ben, imo.
Thor's been around longer, but he learned his skills and stuck with them.
I was duscussing this recently, about how he learned all sorts of new things when he showed up un modern times 10-15 years ago.
While i'm sure he's learned some unarmed combat, he sticks with what works for him, melee fighting.
"There's a difference between 10 years experience, and 1 year's experience 10 times".
Thor's a Viking who's fought as a Viking his entire long life. An effective fighting style, but still one style, and he fought with weapons a majority of the time.
Like i said, i'm sure he's learned things in modern times, but he sticks with what he knows. It works for him.
Originally posted by Damborgson
And was Thor your average viking, that might be true. He's had a little more variety than your typical drunken brawler his whole life. He's fought across the nine realms and more, and even if 90% was with Mjolnir or other weapons that's still thousands of years without it.