Poles haven't got clear stereotype of Lithuanians (like drinking Russian or ugly German woman), but we pin some features of you:
1.you hold a grudge against us for stealing Miskiewicz, Moniuszko and Kosciuszko
2.you are frugal, we can rely on you in finances, and you always keep promises
3.we are good friends, because we have common history. Poles like Lithuanians and believe you're good partners drink vodka together ;)
Now we hear from TV your governement isn't good for Poles in Lithuania - they don't accept Polish names of streets, but I remember after Polish Air Force crash in Smolensk your governemet designated 4 national days of mouring. It was very kind.
We have various, long and common history. Our best king Jagiello was Lithuanian. Then we brought Polish-Lithuanian Union and Polish-Lithuanian Commonwealth later. Jagiello fought with Teutonic Knight and won Battle of Grunwald. I live close to Grunwald - they organize spectacular performance every year.