I prefer the north side myself because i find it to be less crowded.
North side is always way less crowded and Duncan Express Quad to the top is usually faster than waiting in line for gondola on the south side. The best runs on South side are all up top, so just lap TGV chair. there isn't much below TGV chair anyway.
Just spoke with friends that were up there Monday. Le Soleil side is very icey (and that's coming from Tremblant pass holders. read: skating rink)