Well, since you ask so nicely....
Tignes, summer, orribly cold, very windy and bleak, funicular access, too windy for top cable car, scrounged some skis
Zermatt summer and late autumn, hot sun, cold air. Very high sunscreen needed. Plenty of ski rentals, altitude can be very tiring at first. Limited slopes open, not suitable for beginners, access by draglifts after a gondola, and 2 cable cars. Early starts, finish by 3pm. Share the slopes with race teams despite their renting of private lanes from the resort
Snow quality generally excellent, due to cold air