I'll throw my opinion out there... but let me preface that by saying I have only been to Tahoe one time, and it was at least 10 years ago.
With that said... on our trip we went to Heavenly, Kirkwood, and Alpine Meadows. Alpine Meadows was the favorite of everyone in our group, for a couple of reasons.
Now I don't know if this is always the case, but when we were there - there was basically no one there. Not nearly as crowded as the other 2 resorts were.
Looking at the trail map online, we stayed on the backside nearly the entire day as it had snowed like 2 feet overnight and we were basically the only people out there, taking the one single lift multiple times in a row just ripping fresh tracks.
I think Alpine is also significantly cheaper compared to the other resorts too?
Kirkwood was also a really cool place that we all liked a lot, and everyone hate Heavenly.
Just my opinion... and again, it was from when I was like 15 years old.