I liked(Finland is one of those places that'll divide people to 'likers' and 'haters'. It all depends on one's goals and preferances.)

+clean air and nature
+easy to find a place for relaxation in the middle of nowhere
+nature
+fishing waters in Lapland
+lakes and rivers
+Northern Lights
+snow and ice
+summer & summer music festivals
+many people speak English, good for travelers
+gentle variety between different areas of the country
+easy to do most sports
+silence

I disliked(Finland is one of those places that'll divide people to 'likers' and 'haters'. It all depends on one's goals and preferances.)

-expensive
-Helsinki area
-the closing hours of bars
-small countryside towns
-the people who are distant and quite cold unless they know you
-living in F.
-attitudes of 'certain' people
-the government