Worst:
Cooper Lifeliner SLE, 225/50R17 on a Volvo S80
Worn out in 35k, not very quiet, noticeably worse fuel mileage (my Blizzak WS50s were better), downright dangerous in the snow (any incline at all = not moving, washed out exceptionally easily in turns, even for all seasons)
Best:
Michelin Defender 225/55R17 on a Chrysler 300M
Quiet, economical, wear like iron (lost only 1/32" in 15k), pretty good in snow for an all season. Not great for an aggressive driver though.
Pirelli P7 Cinturato is very high on my list as well, especially since they cost much less than Michelins.