if you're not going on season you're better off just hunting down the powder, watch meteo data and chase the storms :)
otherwise courmayeur, serre chevalier, chamonix, espace killy, zermatt, saas fee, etc....
Les sybelles is also quite fun because you have a great resort, and lots of fun inbounds and outbounds with 5 minutes hikes, not as "radical" as some other spots in the alps, but very fun, especially if you're skiing with non-freeride friends ....