As the economy gets better our freeways will get congested again.
Here are some sites to get more info.
http://www.bestrosevillehomes.com http://www.bestrocklinhomes.com http://www.oursacramentohome.com
This used to be an "opposite commute" but the freeways are pretty congested now at rush hours that eastbound is pretty busy in the morning and westbound is awful in late afternoon. Especially between I-65 and Riverside. - A four mile strectch that can take ten minutes and cause gray hairs.
Roseville has every kind of living accomodations that Sacramento has, so I don't know why you would prefer adding the daily cost and hassle of commuting.
If it is a vibrant weekday nightlife you are seeking. Um, Sacramento ain't it either. And it is a lot easier to commute to the nightclubs in Sacramento on a Friday or Saturday night than to spend 10 rush hours a week in traffic. Sometimes there is night life in Roseville (surprise). For example, there was a rave party on Industrial Boulevard weekend before last that was shut down by the Rocklin Police because people were having too much fun
Now going home could take a little longer, again depending on where you live and where you are working. If you work in certain parts of Roseville, you could get on the freeway at Riverside, and avoid the slow traffic areas before there. You're still probably gonna get stopped up/slowed down on Bus. 80.
If you plan on working in Roseville, finding a place to buy or rent in Roseville would be a good idea if you want to avoid that commute time. But you're commuting time won't be as bad as those who are working in Sacramento and live in Roseville.
When I drive to dowtown Sac from Roseville at non-rush hours, it takes me about 20-30 minutes.
Hope that helps.