I doubt that the chalga would have been very successful for us. After all it's again somekind of ethnic related music, which is in Bulgarian language => ideal candidate for last place in the jury vote.
I wrote "years ago"... I think Bulgaria could have ended up rather successful in the 100% televoting era with chalga stompers... instead we got some rather odd attempts most of the times
And even today, the public has proven to be on Bulgaria's side more so than the juries, and a poppy chalga song would probably be more accessible than stuff like "Samo shampioni" which is perhaps maybe TOO ethnic for some... while much of the chalga is more like the booty-shaking stuff we've got from Greece, Armenia, Turkey over the years... and that stuff has ended up in the top. 10 all the time more or less.