My first five years as an instructor was at Bear Mountain (I think they changed the name cleverly to "Big Bear Mountain"). NOte that these comments are based on that experience and I've been out of California for more than five years.
If you are used to big mountains - don't expect much and avoid the weekends. I agree that there seems to be a lot of snowboarders and lots of people doing more than they are capable of! During the week, however, both Snow Summit and Bear Mountain are lots of fun. Bear has several peaks and if the snow is good the valleys between are challenging and fun. There is a little off piste, but it's easy to get lost and that could be very problematic there.
The city of Big Bear is delightful. I lived there for six years and really enjoyed that chapter of my life. There is a lot going on and when I chat with old friends, it seems that more keeps happening there. Which cynically begs the question of when will it become a suburb of Hollywood?
If you want to chat about it send me a PM.