Estonia is gorgeous, though I've only been to Talin. Very medieval. Being from the United States, I enjoy most places in Europe because of the history. Estonia is a very clean country, some beautiful flowers, and lots to see. Very temperate climate as well. I hope you get to visit there.
I lived in Lithuania as a student. The people were, in 2003 anyway still Communised. Vilnius is a nice city. Beautiful girls and meat head boys everywhere. Food and drink are nice. The people dont mean to be but they are cold cold fish.
Riga: Violent dangerous shit hole
Tallinn Estonia: The most beautiful old town ive done ever seen. The most modern of the three countries due to Finnish money