1. Everybody speaks Russian
In all fairness, it's not difficult to see why people tend to think this. The Baltic states were part of the Russian cultural space for a long time and still have a fairly sizeable Russian minority.
It doesn't really matter that when I try to speak Russian I kind of sound like Brad Pitt in that scene from Inglorious Bastards where he pretends to speak Italian. The belief is still going strong. If I had a penny for every time I heard this stereotype, I'd likely have enough pennies by now to take a Russian course and finally learn the damn thing!
It's important to point out that Estonian, Latvian and Lithuanian are actual languages and not some weird mumbo-jumbo Tolkien made up to make his race of magical badger people seem more authentic. While the older generation does speak Russian fairly fluently having grown up in the Soviet Union, younger generations are definitely more oriented towards English.
Everything is in English nowadays, and with everyone from the weatherman to Tony Stark shouting at us in this language, even the slowest learner will pick up some eventually.
2. It's always cold
It can't be warm in Eastern Europe, right? After all, it's right next to Russia, a country where temperatures above 0 °C have been outlawed since the dawn of time. And the Baltics are right next to Russia, which means that the only things the locals do are drink vodka, go ice fishing, get into fist fights with polar bears, listen to "Ice Ice Baby" by Vanilla Ice and then drink some more vodka. Which is totally not true! "Play That Funky Music" is a much more refined tune and should be considered the epitome of Vanilla Ice's refrigeration-themed musical career.