I'll be honest so don't get offended
West Slavic languages
Czech sounds like baby talk (like when you are talking to children)
Polish sounds like someone's talking through his teeth (Å Å¡)
Slovak sounds completely normal (surprisingly similar to southern Slavic languages)
East Slavic languages
Ukrainian sounds a lot like Serbian attempting to speak Russian (at least when it comes to western part of Ukrainian)
Russian sounds very pleasant but also very funny with very emphasized accent although very soft sounding
I have no experience with Belarusian
and now for the
South Slavic languages (there is too much to explain in one post) every region of former Yugoslavia has its own particular accent or pronunciation and with it certain associations and stereotypes
Slovenians practically yodel while talking
of course there are certain stereotypes that accompany that accent/pronunciation (because they were always very progressive Slovenes are often associated with gays but there are also other associations/connotations, mainly concerning "loose women" and stinginess
)
Croatian varies drastically for example, Dalmatian has a very particular accent and pronunciation and can be quite difficult to understand, northern Croatian can be quite irritating but also very "sophisticated" while Slavonian ("Pannonian" Croatian) is very close to Vojvodina Serbian and can be very funny as they speak very very slowly and have a habit of drawning-out sentences (same for Vojvodina Serbian)
language spoken in Bosnia and Herzegovina is ridiculously funny because of pronunciation and accent but also because of various associations/connotations! Of course Bosnians were always the most rewarding for jokes (stereotype is that they are not very blessed with intelligence)
language spoken in Montenegro sounds very rough and distorted of course it doesn't help that everyone is yelling while talking
but by far the funniest are Bulgarian, Macedonian and southern Serbian/"Torlakian"
since they have only two cases (if I remember correctly) and very primitive "simplified" grammar it literally sounds like caveman talk ("my name Miško, what your name")
Macedonian and southern Serbian are still largely intelligible (they sound like someone with a serious speech impediment) but i would say Bulgarian is even funnier because it is full of archaisms (since it remained relatively isolated from "common Yugoslavian" vocabulary)
again please don't take offense, what I'm saying is not meant to be malicious but in the spirit of this topic
BTW how dose our "Å tokavian" sound to Bulgarians, is Serbian-Croatian funny sounding to you??