Foster City is a small city that has a lot of great things going for it. Yes, the rent may seem pretty high even by California standards, but the jobs in the area pay pretty well and there are a lot of opportunities if you work in technology or finance. It's a really good choice for entrepreneurs.
There's always something to do in Foster City. The summer has plenty of outdoor activities you can partake in and some great farmers markets if you like fresh produce. You won't have to go far to do your shopping since the downtown area has lots of markets and major chains such as a Target and Home Depot.
The best area in Foster City is anything along the water. It's simply a beautiful view and there are a bunch of small parks and places to walk along. Plus, you may see some interesting street performers while you're walking along Beach Park Boulevard.