Morzine is low altitude but pretty. Moderate priced compared to other French resorts. More expensive than Austria and Italy. Lots of moderately sloped blues and even the reds aren't very red. Not a heck of a lot of off-piste. Be prepared to do a bit of walking if you aren't near the lifts, and to be fair, most accommodation is a hike.
Very easy transfer from Geneva.
If renting kit, try and leave it at the rental shop if near the lifts. If taking your own, then bribe a shop to keep your kit!
Supermorzine telecabine is not very super, 6 seater and tired.
Avoriaz is good for altitude but horrendously unpretty, despite sticking wood onto the concrete buildings.
All in all, morzine is fine and pretty, but not very snowy. Thank god for artificial snow cannons.