I was at Clermont ferrand and Dijon myself. The energy in Dijon was the best. Haven't been to paris Caen and Rennes so can't judge about that one. In general it seems that concerts where it's hot are the best these days. Don't know why, but except RAH1 which is also one of my faves it seems that all other faves were the hot ones: Zwolle Stuttgart and Frankfurt.