There are no spanish accents.
Most are scandinavian (nords), english (dunmer) and irish. For example, the stormcloak guy on the cart in the intro speaks with a scandinavian accent, with a hint of irish.
I love the voice acting in Skyrim, it's varied with obvious links to real world cultures (As in ALL fantasy) yet with a slight twist in places.
The guy that speaks like Arnie is a legend

EDIT: Are you from the US by any chance? I have an american friend who I have had this conversation with a few times, he has trouble distinguishing between english and australian for example.
We came to the conclusion that the wide reach of american born movies and television make it hard for people from the US to learn accents, whereas people all over the world can probably distinguish between a New York accent and a Boston one.



