Well, a swedish accent.
Not all that noticeable though, unless I'm nervous (I've been mistaken for being british once or twice).
It also sort of depends on the person I am speaking with. I tend to copy accents quite a lot.
http://img4.wikia.nocookie.net/__cb20130926230201/thegamingfamily/images/0/08/America's_next_top_lel.jpg
Edit: The IMG BB code is not working well for me tonight