Interesting summary of Slav on Wikipedia - speaking several languages and a degree, he’s obviously a bright fellow:
“Along with his native Croatian, Bilić is fluent in German, Italian and English, while he also holds a degree in law. As a big fan of rock music, he plays rhythm guitar with his favoured red Gibson Explorer and is a member of Rawbau, a Croatian rock band. In 2008, the band recorded a song for Croatia's performance at Euro 2008 called "Vatreno ludilo" (Fiery Madness). Bilić has identified himself as a socialist, and has said, "If you know to share what you own, you live happily and with honor. I am a true socialist. I know I can't save the world on my own; but if there is a struggle against unjustness, I always prefer to be on the frontline, and that is my attitude toward lifeâ€