Speaking with BILD, Prodl says the support of Watford fans is something he's never experienced before.
He said: "It was hard for me to leave Bremen because I'm a loyal guy. But it was the absolute right step. I fulfilled my dream. The Premier League suits me.
"The pace is already higher and the duels are much harder. But I grew up and have broad shoulders (laughs). The fan scene is also much more positive here than in Germany.
"Such club love like with Watford, I have otherwise experienced only in Bremen. Even in times of crisis, we players are rarely insulted by the fans. That's a big difference to the Bundesliga, where you sometimes have to take a lot."