We were lucky enough to have stayed in Praz for the whole winter and skied most days, we had a season pass which allowed us to ski the whole of Espace Diamant, which covers you for 5 areas including Flumet, Notre Dame de Bellecombe, Les Saisies and Crest Volland and is massive! we never got bored, it's easy to cover the area with good lifts in most places. It's much cheaper than nearby Megeve, but if you fancy a night out there it's very close.
Praz sur Arly is a great resort, the night life is low key but it's very friendly and not many English go, so it's a real hidden gem. I would definitely recommend this resort if you enjoy slightly more challenging runs. There's also some great snow parks if that you thing too. great for skiers and boarders.