Sacramento isn't that bad, but I-80 between Sac and the City (That's San Francisco to you visitors, never ever say 'Frisco') is a poor excuse for a freeway. I definitely don't recommend going to the City BECAUSE OF I-80. In case I didn't say it, it sucks.
I definitely second the idea for visitors to see Tahoe, Yosemite, and Mt. Lassen if you ever visit Sac. If you like wine, head over to Napa BUT you have to take goddamn I-80, but not quite as far as going into the city. If you want smaller crowds and just as good wine, head a little further into Sonoma.
Why do I hate I-80? Both my kids and my grandkids live in Sac and I travel there at least once a month on effing I-80.