Sierra is a nice, kind of out of the way place. It's not the shitshow Northstar is, with crowds.
That said Northstar was fun. Not challenging terrain but I don't always need that.
If you can make it to Squaw and Alpine those two are great
We went to Tahoe for five years before finally hitting Northstar...always heard such shit about it. It's like a mall with a ski resort behind it. But the local Shell stations were offering free tix with a minimum 10 gal fill up, so we went to two gas stations and forced 20 gallons into the rental, and then went to Northstar. It's a beautiful resort. The blues got boring pretty quick, but a big-ass storm moved in and we wound up doing those blacks on the other side during near white-out conditions. It was awesome! Those are some long runs, and no one was on them, all to ourselves. I don't hate Northstar. And the women-folk love it, because of all the shopping and restaurants.