As you know I am French from the other side of the planet so you could find funny that I have stereotypes about people of my own nationality. But French people from France and French people from New Caledonia are very different. So I have to say that I had some préjugés before I came here. Yes, it was my first time in France Mainland !!
In New Caledonia, we call the French "les zoreilles", no offence, it's just a word ! We believe they don't take a shower every day. I don't know if it's true, but you can ask them. We also believe they are stingy (they don't like to spend their money). For this I know it's untrue, since most of them are actually generous ! Everybody told me that people in Paris were rude, but that's not true (OK, I was there only 3 days, but still...) I met very friendly and helpful people.
Concerning the stereotypes of Montpellier, I imagined the people here with a deep south accent, but many people come from others regions, so it's quite not true. What I didn't expect here was the slowlyness of people compared to others parts of France. You can wait all the day in a terrasse, nobody is going to ask you what you want to drink...
Anyway, I took all the best from this city ;)