Also, love to listen to heated, swearing-heavy exchanges from Italians or Spaniards. Don't understand a word but it sounds awesome :)
My conscious swear words have switched to English now, for small things.
When I'm hurt or really in trouble though, French kicks in unconsciously.
What I like about French way of swearing is that it can be infinite since the words are linked together. Most French swear words are descriptive, which means you can almost postpone the subject indefinitely and continue swearing:
"^putain de bordel de chiotte de saloperie de merdasse mal foutue de... [<insert description>]* de merde$"
In Istria we have a nicer version of telling someone to fuck God (jebi Boga) Marry God (idi Boga ženit)... you would say that to family members when you don't want to be vulgar but the message is still more or less the same :-)
p.s- sritno Novo Lito (using my father side ikavica, found in Karojba town region)