Never had a problem with French folks, apart from in Paris (and they're like that to each other, too - it's not anti-foreigner). Most places are supremely friendly.
I did have a very nasty scare at Toussus, though. There are two parallel runways, and I was lined up on final to 08R (or whatever it was) when another aircraft crossed directly ahead of me (and scarily close) to line up for 08L. He and ATC were speaking very fast, in French, and I had no idea what was happening. There was no warning, and I did tell ATC - with the response "Yes, monsieur, he's landing on 08L". That was a while ago: these days, I'd have filed an MOR.