My top three favorite accents are Russian, Polish, and Scottish. I love, love, love the sound of a Russian person speaking english with their thick accent, it's my favorite :)
One of my best friends is Polish, so I hear her and her mom speak it a lot and my history teacher last semester had a thick Polish accent and I think it sounds really cool.
Finally, my uncle is from Scotland (as are his kids, my cousins) so I hear Scottish accents very frequently.