I must admit I don’t like hearing weird accents. There are some Slovak diplomats (e.g. Lajčák) that speak SCBM very well, the accent is almost unnoticeable if you’re not looking for it. However there’s a Slovak Serbian accent, you can recognize it easily, I’m not fan of that accent per se, but I like hearing it and realizing that there’s a Slovak behind it.
I think I’ve heard every Slavic ethnicity speak Serbian except Bulgarians and Belarusians. I like the Eastern one the least. They tend to pronounce vowels really weird, palatalize everything and adding that ы sound or e if there are “too many” consonants together.